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Yo_Mama_Been_Loggin

(135,713 posts)
Fri Jun 27, 2025, 08:03 PM Jun 2025

What is thimerosal, the flu vaccine ingredient targeted by RFK Jr.?

Federal vaccine advisers installed by Health and Human Services Secretary Robert F. Kennedy Jr. voted Thursday to stop recommending influenza vaccines containing thimerosal, a preservative that has been long criticized by anti-vaccine activists.

Scientists and public health authorities have deemed thimerosal safe, and the vast majority of flu shots don’t have it. But the removal would probably make flu vaccines more expensive and harder to receive for some Americans, public health experts said.

Medical experts say the move is the latest by Kennedy, who was a longtime anti-vaccine activist before he joined the Trump administration, to chip away at vaccine policies. Here’s what to know about thimerosal:

Thimerosal, which the Food and Drug Administration describes as a “mercury-containing organic compound,” is used as a preservative in vaccines to stop microbial growth and prevent contamination. Since 2001, all childhood vaccines licensed and recommended in the United States have been thimerosal-free, with the exception of some multi-dose formulations of flu vaccines.

https://www.yahoo.com/news/thimerosal-flu-vaccine-ingredient-targeted-001119190.html

“Striking how little they seem to know”: RFK Jr.’s CDC vaccine panel alarms experts

A federal advisory panel led by allies of Department of Health and Human Services Secretary Robert F. Kennedy Jr. has voted to stop recommending flu vaccines containing the preservative thimerosal for children and pregnant women, despite overwhelming scientific evidence that the compound is safe.

Thimerosal has not been included in most childhood vaccines for more than two decades, and dozens of studies have debunked claims linking it to autism. Still, Kennedy and his supporters have long targeted the ingredient as part of a broader vaccine skepticism campaign. The only dissenter on the CDC vaccine panel, Dr. Cody Meissner of Tufts Children’s Hospital, called the move unjustified.

“The risk from influenza is so much greater than the nonexistent risk as far as we know from thimerosal,” he said, per the New York Times.

The vote was the first sign that Kennedy’s reconstituted Advisory Committee on Immunization Practices (ACIP) may seek to reverse longstanding vaccine policies. The committee’s chair also floated eliminating a combination vaccine for measles, mumps, rubella, and chickenpox in children under four, citing a minor risk of febrile seizures, despite the CDC recommending separate shots for the first dose. The ACIP panel is expected to vote on that proposal in the near future.

https://www.yahoo.com/news/striking-little-seem-know-rfk-200437261.html

81 replies = new reply since forum marked as read
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What is thimerosal, the flu vaccine ingredient targeted by RFK Jr.? (Original Post) Yo_Mama_Been_Loggin Jun 2025 OP
Harmless, according to real medical experts, which RFK Jr is not. milestogo Jun 2025 #1
All "medical experts" are not equal biophile Jun 2025 #4
I am not well versed wrt children, but I personally think that scipan Jun 2025 #22
I believe mercury is a heavy metal womanofthehills Jun 2025 #9
Childhood vaccines already don't have it. Blue Full Moon Jun 2025 #19
However - flu shot is recommended for 6 month old babies womanofthehills Jun 2025 #23
The amount doesn't amount to a hill of beans Blue Full Moon Jun 2025 #25
That's wrong blubunyip Jun 2025 #40
A Reaction From 4 Micrograms Of Mercury... ProfessorGAC Jun 2025 #73
Ha nope blubunyip Jun 2025 #81
After three visits to the hospital purple_haze Jun 2025 #80
This message was self-deleted by its author LostOne4Ever Jun 2025 #30
The multi dose vials need it to prevent cross-contamination AllyCat Jun 2025 #77
Thimerosal IS ethyl mercury based TnDem Jun 2025 #2
Agree ... nt Raine Jun 2025 #3
Yes and it also used to be in contact lens cleaners biophile Jun 2025 #5
I've worn contacts for forty-five years Yo_Mama_Been_Loggin Jun 2025 #7
It did affect me. murielm99 Jun 2025 #33
Yes many adverse reactions to contact lens solutions that used to contain it. blubunyip Jun 2025 #41
It's been gone for decades. Pharmcos found other alternatives -- not just safer, but maybe more effective. nt eppur_se_muova Jun 2025 #68
Fuck RFK jr and his anti-vax nonsense... JCMach1 Jun 2025 #6
Like him or not - this is a good thing womanofthehills Jun 2025 #10
Not arguing with anti-vax propaganda... Especially on DU JCMach1 Jun 2025 #11
OK, I wonder why... TnDem Jun 2025 #12
and did any of those countries have a record as good as ours did under Anthony Fauci? cadoman Jun 2025 #13
One question TnDem Jun 2025 #14
when overwhelming scientific consensus is established, it's harmful to publicly disagree cadoman Jun 2025 #15
You didn't answer the question TnDem Jun 2025 #46
A measles vaccine in Washingtons time would have Captain Zero Jun 2025 #55
Washington sterile? TnDem Jun 2025 #57
you misunderstand me: the overwhelming scientific consensus is what is right, not Fauci individually cadoman Jun 2025 #70
Marginally credentialed? TnDem Jun 2025 #75
Chemist Here ProfessorGAC Jun 2025 #74
you surely don't believe RFK Jr has our best interest at heart, correct? Skittles Jun 2025 #21
Not exactly. The TD and flu vaccines still have it. Blue Full Moon Jun 2025 #24
I dont argue with antivaxxers. 1. They are wrong JCMach1 Jun 2025 #27
CDC says tetanus vaxx every 10 yrs - new studies disagree with CDC womanofthehills Jun 2025 #29
! LudwigPastorius Jun 2025 #17
Let me recommend your post 500,000 times Orrex Jun 2025 #49
Yes, exactly. nt Raine Jun 2025 #32
Thimerosal used to cause severe allergies in contact lens wearers Ritabert Jun 2025 #8
Did you see my comment above? Yo_Mama_Been_Loggin Jun 2025 #26
Did you see my comment above? murielm99 Jun 2025 #34
Me too blubunyip Jun 2025 #42
It didn't happen to everybody but the results were dramatic in those it did Ritabert Jun 2025 #44
I was one of those Maeve Jun 2025 #38
I have said that I am allergic to mercury, murielm99 Jun 2025 #43
I suspect a lot of them don't know what thimerosal is Ritabert Jun 2025 #45
Since the covid pandemic, I still "mask" in public, and haven't had the flu or anything else Jack Valentino Jun 2025 #16
The decision was based on a fake report. Blue Full Moon Jun 2025 #18
ethyl mercury and animal studies womanofthehills Jun 2025 #28
I thought thimerosal was already removed from most if not all vaccines sakabatou Jun 2025 #20
It was removed yrs ago from childhood vaccines womanofthehills Jun 2025 #60
I think it is time to revisit this meme LostOne4Ever Jun 2025 #31
OK then it's settled via your meme TnDem Jun 2025 #51
No it's settled by basic junior high level chemistry LostOne4Ever Jun 2025 #61
But they haven't passed flat earth laws TnDem Jun 2025 #62
No it called a counter example LostOne4Ever Jun 2025 #65
No, it's not a "counter example" TnDem Jun 2025 #66
I did give science LostOne4Ever Jun 2025 #67
Mercury is a toxin bucolic_frolic Jun 2025 #35
Your post is debunked antivax talking points from start to finish. Orrex Jun 2025 #48
How is eliminating mercury from the flu vaccine anti vax? womanofthehills Jun 2025 #69
You're using the exact same arguments as full-blown antivaxers Orrex Jun 2025 #79
Chlorine is a deadly gas, sodium readily combusts in air Johonny Jun 2025 #54
RFK and his AI science-team is the new masthead for the ant-science demographic. Torchlight Jun 2025 #36
Yeah, in pre-Trump years, DU had a lot of people spewing anti-vax propaganda Orrex Jun 2025 #37
I'm flabbergasted that we have this nonsense here Stuckinthebush Jun 2025 #39
For real. Orrex Jun 2025 #47
How is removing mercury from a small % of vaccines nonsense? womanofthehills Jun 2025 #78
I'm personally a fan of the homeopathy people Sympthsical Jun 2025 #50
So thimerosal Rebl2 Jun 2025 #52
No - 91% of flu shots have no ethyl mercury womanofthehills Jun 2025 #71
Thanks Rebl2 Jun 2025 #76
Making things more expensive is a Trump theme Johonny Jun 2025 #53
.. whfinlay Jun 2025 #56
Conservatives hate science... -misanthroptimist Jun 2025 #58
Just got a blood titer last week Sympthsical Jun 2025 #59
RFK JR is trying to kill people with his anti-vax insanity LetMyPeopleVote Jun 2025 #63
I'm alergic thimerosal Omaha Steve Jun 2025 #64
When I ForgedCrank Jun 2025 #72

biophile

(1,424 posts)
4. All "medical experts" are not equal
Fri Jun 27, 2025, 08:38 PM
Jun 2025

Many are paid by pharmaceutical companies; many do not even read the studies they claim to show defense of their positions, and medical academia treats those who question the status quo very harshly. Some just follow the “science” until the “science” changes. Science isn’t static but getting doctors to change their mind about what they were told previously is hard. A true scientist should be open to new information that might disprove a previously held “truth”.

scipan

(3,041 posts)
22. I am not well versed wrt children, but I personally think that
Sat Jun 28, 2025, 12:09 AM
Jun 2025

the advantages outweigh the possible costs. It's a preservative.

womanofthehills

(10,988 posts)
9. I believe mercury is a heavy metal
Fri Jun 27, 2025, 09:01 PM
Jun 2025

It should have been removed 30 yrs ago. We no longer fill our teeth with it.

The US gov made 170 million flu vaccines last year of which 15 million had mercury. It’s not in single dose flu vaccines but only multi dose vaccines. Some pharmacies wanting to save money use multi dose as it’s cheaper.

6 month old babies often get flu vaccines- do we really want to inject them with a heavy metal?

Blue Full Moon

(3,484 posts)
19. Childhood vaccines already don't have it.
Fri Jun 27, 2025, 11:59 PM
Jun 2025

It's flu and TD. And they use it for those vaccines in Europe too.

womanofthehills

(10,988 posts)
23. However - flu shot is recommended for 6 month old babies
Sat Jun 28, 2025, 12:13 AM
Jun 2025

So some babies might get the multi dose vaccine.





Blue Full Moon

(3,484 posts)
25. The amount doesn't amount to a hill of beans
Sat Jun 28, 2025, 12:38 AM
Jun 2025

There is heavy metals in the food and water. It is there naturally. The benefit of the vaccine outweighs the not significant amount of thimerosal. Does not cause autism. Autism has been here the whole time that one eccentric relative that every family has.

blubunyip

(286 posts)
40. That's wrong
Sat Jun 28, 2025, 08:53 AM
Jun 2025

I had a serious reaction to a tiny amount of thimerisol. It should not be in any medications.

Can’t stand RFK but on this — it’s true —and it is not a necessary ingredient in vaccines.

ProfessorGAC

(76,704 posts)
73. A Reaction From 4 Micrograms Of Mercury...
Sat Jun 28, 2025, 07:04 PM
Jun 2025

...as part of an organometallic compound that is soluble in water?
That is scientifically difficult to accept.
I think there is, at least, an equal chance of misdiagnosis.

blubunyip

(286 posts)
81. Ha nope
Sat Jun 28, 2025, 10:41 PM
Jun 2025

Definitely no misdiagnosis. As others in this thread have also posted. It’s a thing.

 

purple_haze

(401 posts)
80. After three visits to the hospital
Sat Jun 28, 2025, 09:45 PM
Jun 2025

immediately following vaccine administrations, one of which nearly killed me, my folks stopped giving me vaccines in my early childhood many decades ago. I haven't had one since. I react to something in them (respiratory distress, in a major way) and its essentially impossible to isolate what ingredient is the problem without rolling the dice.

Response to womanofthehills (Reply #9)

AllyCat

(18,842 posts)
77. The multi dose vials need it to prevent cross-contamination
Sat Jun 28, 2025, 07:49 PM
Jun 2025

When re-entering for successive administrations. Single-dose vials are going to be more expensive.

 

TnDem

(1,390 posts)
2. Thimerosal IS ethyl mercury based
Fri Jun 27, 2025, 08:14 PM
Jun 2025

Canada, The UK, Sweden, Denmark, Japan and others have banned thimerosal in childhood vaccines...This is not an RFK jr. idea, it is a FACT .

Check it out and resist deciding for or against something because you don't like someone....RFK jr. finally got the FDA to ban food coloring in the US that the rest of the world had banned for decades.

biophile

(1,424 posts)
5. Yes and it also used to be in contact lens cleaners
Fri Jun 27, 2025, 08:41 PM
Jun 2025

It was removed “out of caution “ - read, fear of eventual lawsuits 😏

murielm99

(32,988 posts)
33. It did affect me.
Sat Jun 28, 2025, 04:01 AM
Jun 2025

I had to go to the ophthalmologist to find out why my contacts were giving me so much trouble. I ended up getting something that was thimerosal free. That was years ago. I had cataract surgery and don't need glasses or contacts any more, just reading glasses.

eppur_se_muova

(41,942 posts)
68. It's been gone for decades. Pharmcos found other alternatives -- not just safer, but maybe more effective. nt
Sat Jun 28, 2025, 05:53 PM
Jun 2025

womanofthehills

(10,988 posts)
10. Like him or not - this is a good thing
Fri Jun 27, 2025, 09:13 PM
Jun 2025

Most people assumed mercury was no longer in our vaccines because it was removed from childhood vaccines years ago. So most people don’t ask the pharmacist for a Mercury free flu vaccine because they assume there was no longer any mercury in our vaccines.

Many studies - hundreds online - connecting heavy metals to Alzheimer’s.

“Assist

Heavy metals, such as cadmium, lead, and mercury, have been linked to an increased risk of developing Alzheimer's disease due to their potential to cause oxidative stress and neurotoxicity. Research suggests that exposure to these metals may accelerate cognitive decline, particularly in individuals with genetic predispositions to Alzheimer's.”

“Heavy metals exposure and Alzheimer’s disease: Underlying mechanisms and advancing therapeutic approaches”

https://www.sciencedirect.com/science/article/abs/pii/S0166432824003681

JCMach1

(29,202 posts)
11. Not arguing with anti-vax propaganda... Especially on DU
Fri Jun 27, 2025, 09:19 PM
Jun 2025

Just going to drop this for anyone before RFKjr deletes it.

Thimerosal and Vaccines | Vaccine Safety | CDC https://share.google/Kll0IXSx8Mq88I0Mi

Its not an opinion. You are wrong. Full stop

 

TnDem

(1,390 posts)
12. OK, I wonder why...
Fri Jun 27, 2025, 09:30 PM
Jun 2025

40 countries have banned thimerosal?

You surely don't believe everyone at CDC has our best interest at heart and not pharmaceutical companies, correct?

 

cadoman

(1,617 posts)
13. and did any of those countries have a record as good as ours did under Anthony Fauci?
Fri Jun 27, 2025, 09:51 PM
Jun 2025

Doubt it.

"Thimerosal use in medical products has a record of being very safe. Data from many studies show no evidence of harm caused by the low doses of thimerosal in vaccines."

What do you find confusing about this statement? Are you a scientist? An epidemiologist? A chemist? An expert on thimerosal?

Why are you helping to build a foundation of credibility for a known fascist and anti-vaxxer?

 

TnDem

(1,390 posts)
14. One question
Fri Jun 27, 2025, 09:55 PM
Jun 2025

So, if any credentialed epidemiologist disagrees with Fauci about something in the same scientific vein, who is wrong?

 

cadoman

(1,617 posts)
15. when overwhelming scientific consensus is established, it's harmful to publicly disagree
Fri Jun 27, 2025, 11:22 PM
Jun 2025

It creates confusion in the minds of the public and emboldens conspiracy theorists.

There are plenty of "credentialed" professionals who have no business stating their opinions and should be exiled from all scientific and medical discourse. Stella Emmanuel, Simone Gold, Martin Kulldorf, Paul Marik, etc.

Credentialed consensus matters. Listen to the credentialed gadflies at your own peril...

 

TnDem

(1,390 posts)
46. You didn't answer the question
Sat Jun 28, 2025, 09:41 AM
Jun 2025

If any credentialed professional with the same or MORE credentials disagreed with Fauci on something vaccine related, is Fauci always right? Is ANYONE always right every single time and everyone else is always wrong? Do you see how myopic and deifying that sounds?

Remember this....All of the best doctors and academic experts in the land tried to help George Washington as he was gravely ill. These best doctors and experts in the land ended up killing him by bleeding him to death on purpose.They thought their treatment plan was the gold standard, when it was actually a death sentence.

Captain Zero

(8,905 posts)
55. A measles vaccine in Washingtons time would have
Sat Jun 28, 2025, 10:53 AM
Jun 2025

given Washington a chance to be a father. Measles at 19 sterilized him.

So my question is this.
Do the Covid vaccines have thimerasol in them?

Also if thimerasol is not currently in children's vaccines then what would be the harm in an actual ban of them in children's vaccines?

 

TnDem

(1,390 posts)
57. Washington sterile?
Sat Jun 28, 2025, 11:20 AM
Jun 2025

Washington being sterile at 19 years old has zero to do with this whether he was literally killed by the leading science of the day.

Did his well meaning, and vast credentialed doctors use leading science of the time and actually kill Washington with that science, yes or no?

As to what covid vaccines have in them, none of us really know? Different credentialed scientists have different findings about what is in those vaccines. I think it's certainly worthy of study and questions.

 

cadoman

(1,617 posts)
70. you misunderstand me: the overwhelming scientific consensus is what is right, not Fauci individually
Sat Jun 28, 2025, 06:33 PM
Jun 2025

Fauci has consistently supported and advocated for the overwhelming scientific consensus. He's actually only a medical doctor (not a biologist or epidemiologist or anything else). But yet he is consistently correct on a variety of subjects because he respects consensus and doesn't veer out of his lane.

The mistake you are making is to allow some marginally credentialed gadfly to overturn the consensus.

 

TnDem

(1,390 posts)
75. Marginally credentialed?
Sat Jun 28, 2025, 07:17 PM
Jun 2025

People like the authors of the Great Barrington Declaration, Robert Malone and many others with stacks of respected credentials?

The problem with credentials equaling knowledge is that it becomes a pissing contest of who you agree with more... If someone flunked high school, but agrees with you or me 100% of the time, then all kinds of intellectual slack is cut to that person.

However, if someone disagrees with us, but is credentialed out the ass, then human nature still wants to find a way to belittle their achievements and their credentials suddenly become quackery and "science deniers" because they don't agree with what the prevailing consensus demands.

ProfessorGAC

(76,704 posts)
74. Chemist Here
Sat Jun 28, 2025, 07:07 PM
Jun 2025

43 years of work.
You are the reasonable one here.
The amounts under discussion are incredibly low and data continues to show it is safe.
Stand tall on your position. There are things in daily life far more concerning than this preservative.

Skittles

(171,713 posts)
21. you surely don't believe RFK Jr has our best interest at heart, correct?
Sat Jun 28, 2025, 12:05 AM
Jun 2025

he is RIDICULOUS

JCMach1

(29,202 posts)
27. I dont argue with antivaxxers. 1. They are wrong
Sat Jun 28, 2025, 01:00 AM
Jun 2025

2. They treat the nonsense they saw on a blog, or YouTube as reality.

So yeah, not arguing but i will call you out on the nonsense and disinformation you are trying to spread.

womanofthehills

(10,988 posts)
29. CDC says tetanus vaxx every 10 yrs - new studies disagree with CDC
Sat Jun 28, 2025, 01:24 AM
Jun 2025

CDC recommends tetanus vaxx every 10 yrs even though new studies say every 30 yrs and World Health Organization says adults who had DTaP as kids don’t need tetanus shot.

“Study shows tetanus shots needed every 30 years, not every 10”

“ We have always been told to get a tetanus shot every 10 years, but actually, there is very little data to prove or disprove that timeline,” says Mark K. Slifka, Ph.D., a professor at the Oregon National Primate Research Center at OHSU. “When we looked at the levels of immunity among 546 adults, we realized that antibody titers against tetanus and diphtheria lasted much longer then previously believed.”

In this study, Slifka and colleagues looked at the magnitude and duration of immunity to tetanus and diphtheria to provide an evidence-based evaluation of the current adult vaccine schedule. Their analysis shows adults will remain protected against tetanus and diphtheria for at least 30 years without the need for further booster shots, after completing the standard five-dose childhood vaccination series.”@

https://www.sciencealert.com/new-study-suggests-we-don-t-actually-need-a-tetanus-booster-every-10-years

AND——

Harvard Health-

“ What does the new study on tetanus boosters suggest?”

A recent paper published in the journal Clinical Infectious Diseases suggested that tetanus and diphtheria booster vaccines are not necessary for adults who have completed their childhood vaccination series. This advice aligns with the current World Health Organization (WHO) recommendations. The researchers reviewed WHO data from 31 North American and European countries between 2001 and 2016, amounting to 11 billion person-years. (Person-years is a measurement that reflects the number of people in the study multiplied by years followed). After comparing the incidence of tetanus and diphtheria, they found no significant difference in disease rates in countries that require adults to receive booster shots compared with those that do not. Based on this, the authors suggest that childhood vaccination alone protects sufficiently against tetanus and diphtheria without booster shots. https://www.health.harvard.edu/blog/do-adults-really-need-tetanus-booster-shots-2020051219786

Orrex

(67,111 posts)
49. Let me recommend your post 500,000 times
Sat Jun 28, 2025, 10:12 AM
Jun 2025

Holy shit I thought DU had gotten over this ignorant antivax bullshit, but apparently my optimism was unjustified.

Ritabert

(2,446 posts)
8. Thimerosal used to cause severe allergies in contact lens wearers
Fri Jun 27, 2025, 08:54 PM
Jun 2025

It was removed from all contact lens solutions and eye drops years ago. Patients would come in with swollen itchy eyelids. On flipping the upper eyelids you'd see a cobblestone appearance of the conjunctiva. Patients had to stop the contact lenses until their eyelids recovered and then use sterile saline for a contact lens solution or be fit with hard lenses. So the potential for severe reactions is possible particularly if you're giving a baby more than one vaccination at a time which is why it was removed from childrens' vaccines years ago.

Yo_Mama_Been_Loggin

(135,713 posts)
26. Did you see my comment above?
Sat Jun 28, 2025, 12:39 AM
Jun 2025

Never had a problem with it. Maybe my eyes aren't as sensitive.

blubunyip

(286 posts)
42. Me too
Sat Jun 28, 2025, 08:59 AM
Jun 2025

Very serious.

People always think a product is just fine if THEY are not in the affected percentage.

Maeve

(43,456 posts)
38. I was one of those
Sat Jun 28, 2025, 07:57 AM
Jun 2025

I do ask for non-thimeresol flu shots to be on the safe side, but frankly most pharmacies and nurses aren't familiar with it when I list it as an allergy.

murielm99

(32,988 posts)
43. I have said that I am allergic to mercury,
Sat Jun 28, 2025, 09:04 AM
Jun 2025

but nobody responds when I say that. I haven't had any sort of problem with vaccinations.

Jack Valentino

(5,011 posts)
16. Since the covid pandemic, I still "mask" in public, and haven't had the flu or anything else
Fri Jun 27, 2025, 11:49 PM
Jun 2025

for almost five years, now.... nor had a flu vaccine. (An incredible record of 'un-sickness' based upon the rest of my life, LOL. Guess I should have started "masking" 40 years ago!)

I did get the full course of covid vaccines and 2 boosters,
but am overdue for a covid booster by about 2 years, I think...

(when you stay away from other people so much, you get sick less often,
it seems, but it is much more lonely)




womanofthehills

(10,988 posts)
28. ethyl mercury and animal studies
Sat Jun 28, 2025, 01:04 AM
Jun 2025

Thimerosal and Animal Brains: New Data for Assessing Human Ethylmercury Risk

Brain concentrations of total mercury were approximately 3–4 times lower in the thimerosal group than in the methylmercury group, and total mercury cleared more rapidly in the thimerosal group (with a half-life of 24.2 days versus 59.5 days). However, the proportion of inorganic mercury in the brain was much higher in the thimerosal group (21–86% of total mercury) compared to the methylmercury group (6–10%). Brain concentrations of inorganic mercury were approximately twice as high in the thimerosal group compared to the methylmercury group. Inorganic mercury remains in the brain much longer than organic mercury, with an estimated half-life of more than a year. It’s not currently known whether inorganic mercury presents any risk to the developing brain.
Given these findings, the researchers caution that risk assessments for thimerosal based on studies using blood mercury measurements may not be valid, depending on the design of the study. https://pmc.ncbi.nlm.nih.gov/articles/PMC1280369/

“Comparison of organic and inorganic mercury distribution in suckling rat”

The results showed that the level of mercury was higher in the liver and kidney of the inorganic mercury group than in the thiomersal exposed group. However, the brain and blood concentrations of mercury were higher in the thiomersal exposed group. These results need to be clarified by additional data on the kinetic pathways of ethylmercury compared with inorganic mercury.

https://pubmed.ncbi.nlm.nih.gov/17080402/

womanofthehills

(10,988 posts)
60. It was removed yrs ago from childhood vaccines
Sat Jun 28, 2025, 12:27 PM
Jun 2025

However- it’s still in 9% of flu vaccines. It’s only in multi dose flu vaccines to kill bacteria as the vial contains many doses the pharmacist dips into. It’s not in single vial flu vaccines - one vial per person.


Kennedy wants to end multi dose flu vaccines - only have single vial.

The pharmacist must also shake the multidose vaccines vigorously.

Groc

Yes, pharmacies and healthcare providers are required to shake multi-dose flu vaccine vials thoroughly before withdrawing each dose to ensure the ingredients, including the preservative thimerosal (which contains ethylmercury), are evenly distributed. This is a standard safety practice to prevent uneven dosing and ensure each dose contains the correct amount of vaccine and preservative.

According to guidelines from the CDC and package inserts for multi-dose flu vaccines like Fluzone Quadrivalent and Afluria Quadrivalent, shaking the vial is necessary because the vaccine is a suspension that may settle, and thorough mixing ensures a homogeneous mixture. For example, the Fluzone Quadrivalent package insert specifies to "shake the prefilled syringe or multi-dose vial" before administration to ensure uniformity. Similarly, Afluria Quadrivalent instructions state to "shake the vial thoroughly before withdrawing each dose" to resuspend the contents.

This step is critical because uneven distribution could lead to inconsistent amounts of the active ingredients or thimerosal in each dose, potentially affecting efficacy or safety. Pharmacies follow these protocols to comply with manufacturer instructions and CDC guidelines for safe vaccine administration.[](https://www.drugs.com/pro/afluria-quadrivalent.html)[](https://www.drugs.com/pro/fluzone-quadrivalent.html)

 

TnDem

(1,390 posts)
51. OK then it's settled via your meme
Sat Jun 28, 2025, 10:15 AM
Jun 2025

40 countries including Canada, UK, Sweden and Denmark are officially "ignorant idiots" for banning ethyl mercury or "thimerosal" in vaccines.

LostOne4Ever

(9,752 posts)
61. No it's settled by basic junior high level chemistry
Sat Jun 28, 2025, 12:35 PM
Jun 2025

And can be tested by everyone he going to the kitchen putting salt on their food and seeing if they get sick or not.

Or you can just look up the research:

https://pmc.ncbi.nlm.nih.gov/articles/PMC3018252/

And your list of countries just proves that there are other countries that have either passed these laws before any studies were done or that they have an anti-vaccine movements that get dumb laws passed. Because all countries get dumb laws passed with enough pressure. Laws like these:

https://www.thelawyerportal.com/blog/top-10-weirdest-laws-around-world/

Laws passed by other countries, especially foreign countries where one has no idea of the politics or background of the legislation, is not scientific proof of anything especially if it goes against all research on the subject.

Or am I to believe that had these countries passed laws saying the earth is flat that you would accept that as proof of the flat earth hypothesis?

 

TnDem

(1,390 posts)
62. But they haven't passed flat earth laws
Sat Jun 28, 2025, 12:54 PM
Jun 2025

That's called a straw man argument....So is the "top 10 weirdest laws" link....I don't think 40 countries ,(and much of this country), banned the substance out of politics and we both know that. I don't think that the UK, Canada, Denmark, Sweden and Japan are bastions of right wing politics all set to ban a substance because of political considerations.

Adding bleach and ammonia which are both standard household cleaners will get a violent reaction and salt is a benign reaction of chemicals...So what? ..More straw man arguments.

We are talking specifically about mercury. NO amount of mercury is safe in any form because it is a poisonous metal..Similar to lead.

LostOne4Ever

(9,752 posts)
65. No it called a counter example
Sat Jun 28, 2025, 01:56 PM
Jun 2025
https://en.wikipedia.org/wiki/Counterexample

I give you the science. You say but these laws say otherwise. I point out that laws don’t dictate science and give an example both real dumb laws that were passed and an extreme hypothetical (flat earth) of how a law denying science does not disprove the science.

This is reductio ad absurdum

https://en.wikipedia.org/wiki/Reductio_ad_absurdum

A well proven argument technique.

“ I don't think 40 countries ,(and much of this country), banned the substance out of politics and we both know that.”

No we don’t both know…which is the point. You don’t know the context of which the laws passed and using them without that knowledge is irresponsible.

Your argument now is that they all can’t be wrong. You did No research on the laws just assume with no proof. Well guess what? They can all be wrong and are.

We know because RESEARCH has been done (I already gave a link as evidence) and found it is safe.

Your argument is groundless.
 

TnDem

(1,390 posts)
66. No, it's not a "counter example"
Sat Jun 28, 2025, 02:12 PM
Jun 2025

You gave no science, you gave something from CDC or NIH, probably penned by someone with pharma ties or their manager.

Citing the "10 weirdest laws on the books" is not a counter example, it is a straw man and a ridiculous one at that.

Over 40 countries with diverse politics and cultures and no pharma influence have banned the substance...That's fact. There wasn't a grand conspiracy with all of the countries to ban a mercury based vaccine additive based on a secret anti-CDC agenda.

It is classic Occam's Razor...The simplest explanation being that these countries have independently surmised that thimerosal has negative issues because of its mercury content.

One question for you....Do you think that big pharma influence ever has an influence over CDC and NIH decisions? Yes or no?

LostOne4Ever

(9,752 posts)
67. I did give science
Sat Jun 28, 2025, 03:41 PM
Jun 2025

Pure Elements do not have the same properties as compounds.
Basic JUNIOR HIGH science. I know cause I taught that in the jr high level (8th grade) science classes I TAUGHT! Here is a online textbook saying exactly that!

“ You gave no science, you gave something from CDC or NIH, probably penned by someone with pharma ties or their manager.”


It was a literature review. It covered several papers by several authors. All researched a peer reviewed.

Which is more than you have obvious done as you didn’t bother to actually look and see if he had any of those connections or not. Nor did you bother to see who his supervisor was or if they had any connections or not.

Not that it matters as simply having those connections does not mean the science is wrong. You need to show how it is wrong. But as you continue to do, you avoid actually supplying any actual evidence to prove your case and instead rely on assumptions, unfounded accusations, and innuendo. You imply a vast conspiracy in the sciences to make up for the fact that you have no evidence to make your case.

You don’t even know what a straw man is.

https://en.wikipedia.org/wiki/Straw_man

I used the very reason you did to disprove you. That is not putting words in your mouth nor is it creating my own example that is completely unrelated to your example to disprove your point. I used your basic premise against you.

You are just mad that your argument is so flimsy that supplying a list to stupid laws was enough to cause your argument to fall apart. Tough. Get a better argument.

“ Over 40 countries with diverse politics and cultures and no pharma influence have banned the substance...That's fact. There wasn't a grand conspiracy with all of the countries to ban a mercury based vaccine additive based on a secret anti-CDC agenda.”


Over 60 countries in the world with diverse cultures ban same sex marriage. Does not mean that is right.

And you are totally ignoring the 150ish or so other countries that haven’t banned it despite no ties to the CDC. Countries like France, Greece, and Ireland:

https://www.sciencedirect.com/science/article/abs/pii/S0168851002000209

You are also ignoring the WHO and countless other medical associations:

https://www.who.int/groups/global-advisory-committee-on-vaccine-safety/topics/thiomersal-and-vaccines/safety

The AMA:
https://jamanetwork.com/journals/jama/fullarticle/197365

The AAP:

https://publications.aap.org/aapnews/news/32530/CDC-vaccine-advisers-call-for-flu-vaccines-without

https://publications.aap.org/pediatrics/article/112/5/1039/28714/Safety-of-Thimerosal-Containing-Vaccines-A-Two

And others.

“ It is classic Occam's Razor...The simplest explanation being that these countries have independently surmised that thimerosal has negative issues because of its mercury content.”


Or they passed the laws because of a global political movement and not science? Besides misusing Occam’s Razor/the law of parsimony by ignoring that it is about competing theories of equal validity and not about denialism vs scientific consensus, you again are appealing to ignorance rather than proof.

What proof do you have that these laws were based on science and not hysteria? You don’t.

My evidence is the mountain of scientific reports from a variety of journals that you try to hand wave away by saying “big pharma” without even an attempt to see if that holds for all of them or not. Much less even consider that there could be “big pharma” funding without it affecting the validity of the results.

“One question for you....Do you think that big pharma influence ever has an influence over CDC and NIH decisions? Yes or no?”


Yes they have influence on the CDC and NIH. Which is why RFK is a big deal. But they don’t have the influence you claim as proven by the pushback RFK has gotten from numerous scientific and medical organizations. And it isn’t enough to corrupt the Literal mountain of reports that show Thimerosal is safe.

That said, I’m done with this debate. You just have that one argument that I refuted in my first reply to you. Or to put it bluntly, You have nothing. I could give you all the proof in the world and it would not convince you.

bucolic_frolic

(55,140 posts)
35. Mercury is a toxin
Sat Jun 28, 2025, 07:21 AM
Jun 2025

Google AI: "Mercury, symbolized as Hg, is a naturally occurring, heavy, silvery-white metallic element that is liquid at room temperature. It's also known as quicksilver. Mercury is toxic to living organisms and can exist in various forms, including elemental mercury, inorganic mercury compounds, and organic mercury compounds like methylmercury."

Tiny amounts in preservatives probably aren't at toxic levels, unless added to additional accumulation from other sources, such as fish, amalgam, or other sources such as vapors, food processes (no longer used as far as I know). I think I read at one time, about 25 years ago, the processes used for molasses production were changed to reduce mercury, same for foods in barrels. Note there are fish products - tuna, salmon - rated for mercury levels, so there is something going on there. People sensitive to mercury levels know to avoid swordfish, Atlantic salmon.

There are books written on the subject, such as dentist Hal Huggins. There are other books as well.

If mercury is a whole lot of nothing, there's a lot of people trying to avoid it for health reasons.

womanofthehills

(10,988 posts)
69. How is eliminating mercury from the flu vaccine anti vax?
Sat Jun 28, 2025, 06:18 PM
Jun 2025

All that will be happening is flu vaccines will now all be single vial vaccines (no multi dose with mercury).

As of now 91% of flu vaccines are mercury free.

Orrex

(67,111 posts)
79. You're using the exact same arguments as full-blown antivaxers
Sat Jun 28, 2025, 09:22 PM
Jun 2025

If it walks like a duck...


I decline to engage further with you regarding antivax talking points. They are 100% bullshit informed by culpable ignorance, and they've been debunked years, decades, or centuries ago.




Johonny

(26,178 posts)
54. Chlorine is a deadly gas, sodium readily combusts in air
Sat Jun 28, 2025, 10:41 AM
Jun 2025

But the compound sodium chloride is completely safe to eat. Chemistry!

Torchlight

(6,830 posts)
36. RFK and his AI science-team is the new masthead for the ant-science demographic.
Sat Jun 28, 2025, 07:26 AM
Jun 2025

(pro tip: citing an irrelvant study will neither weaken nor strengthen my assertion)

Orrex

(67,111 posts)
37. Yeah, in pre-Trump years, DU had a lot of people spewing anti-vax propaganda
Sat Jun 28, 2025, 07:27 AM
Jun 2025

Sad to see it resurface now.

Stuckinthebush

(11,203 posts)
39. I'm flabbergasted that we have this nonsense here
Sat Jun 28, 2025, 08:43 AM
Jun 2025

But anti vax foolishness, clearly, has no partisan boundary.

What’s next? Flat earthers showing up?

Sympthsical

(10,969 posts)
50. I'm personally a fan of the homeopathy people
Sat Jun 28, 2025, 10:13 AM
Jun 2025

The response to which can only ever be, "So you're saying it's magic . . ."

Got a Hep A vaccine yesterday (so I can work in hospitals). A shot with so much liquid for some reason, they have to attach the syringe to a bucket.

Rebl2

(17,740 posts)
52. So thimerosal
Sat Jun 28, 2025, 10:30 AM
Jun 2025

is used to stop microbial growth and contamination. Wonder if that means (and maybe this is already done) flu shots will need to be kept refrigerated and have a much shorter shelf life.

womanofthehills

(10,988 posts)
71. No - 91% of flu shots have no ethyl mercury
Sat Jun 28, 2025, 06:46 PM
Jun 2025

They are in single sealed vials so bacteria, germs and fung can’t enter. Pharmacist opens vial - gives one shot and discards vial

9 % of flue shots are called multi dose. That means each vial can be divided to give usually 10 vaccines. Because the pharmacist could openand close the vial multiple times it could get contaminated with bacteria, funji etc Mercury kills the bacteria. Also -pharmacist error can happen when this many doses are from one vial. Vial has to be shaken vigorously to make sure all ingredients are mixed according to vaccine inserts.

All flu shots are kept under refrigation and most have a shelf life till the summer of the following year. Slight differences with different companies.

Johonny

(26,178 posts)
53. Making things more expensive is a Trump theme
Sat Jun 28, 2025, 10:39 AM
Jun 2025

Vaccines like everything else is only meant for the ruling class. Everyone else doesn't matter.

-misanthroptimist

(1,615 posts)
58. Conservatives hate science...
Sat Jun 28, 2025, 11:21 AM
Jun 2025

...except when it agrees with them. Much like their attitude toward the Constitution and (for Christians) the Bible.

It's all about them.

Sympthsical

(10,969 posts)
59. Just got a blood titer last week
Sat Jun 28, 2025, 11:33 AM
Jun 2025

To check on immunity/antibodies before I start clinicals in hospital.

It's really impressive when you think about it. I'm mid-40s, and my MMR vaccine from childhood was still chuggin away. All antibody measurements just chilling at all the right levels.

The only thing that had tapered off was Hep A. Had to get a new series of that.

We have come so far as a species to banish diseases that could have ended any one of us in our childhoods, and it's like, "Nah, let's throw away that progress. I read some shit on the Internet."

LetMyPeopleVote

(179,869 posts)
63. RFK JR is trying to kill people with his anti-vax insanity
Sat Jun 28, 2025, 01:46 PM
Jun 2025

Thimerosal is not dangerous in the real world

Omaha Steve

(109,228 posts)
64. I'm alergic thimerosal
Sat Jun 28, 2025, 01:51 PM
Jun 2025

Because of that, I can't wear make up. It is used as a preservative in make up.

OS

ForgedCrank

(3,096 posts)
72. When I
Sat Jun 28, 2025, 06:52 PM
Jun 2025

was a teenager, I was having all sorts of issues for a month or two. It was eventually traced back to thimerosal. They said it was because of the solutions I was using as I had just started wearing contact lenses. For years, I avoided anything with that ingredient because I did not want to get that sick again..
Then at some point I found out the truth. I had been getting vaccines, flu shots and stuff all that time without reaction. So either I "lost" my allergy to thimerosal, or I never had one to begin with. Still not sure to this day, but it doesn't bother me at all.

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