General Discussion
Related: Editorials & Other Articles, Issue Forums, Alliance Forums, Region ForumsI can't wait till this Covid-19 vaccine, Covaxin, comes to the US. This is what I'm waiting for.
Covaxin works by teaching the immune system to make antibodies against the SARS-CoV-2 coronavirus. The antibodies attach to viral proteins, such as the so-called spike proteins that stud its surface.
Spikes
Spike
protein
gene
To create Covaxin, Bharat Biotech used a sample of the coronavirus isolated by Indias National Institute of Virology.
Killing the Virus
Once the researchers produced large stocks of the coronaviruses, they doused them with a chemical called beta-propiolactone. The compound disabled the coronaviruses by bonding to their genes. The inactivated coronaviruses could no longer replicate. But their proteins, including spike, remained intact.
The researchers then drew off the inactivated viruses and mixed them with a tiny amount of an aluminum-based compound called an adjuvant. Adjuvants stimulate the immune system to boost its response to a vaccine.
Inactivated viruses have been used for over a century. Jonas Salk used them to create his polio vaccine in the 1950s, and theyre the bases for vaccines against other diseases including rabies and hepatitis A.
Full article
https://www.nytimes.com/interactive/2021/health/bharat-biotech-covid-19-vaccine.html
SWBTATTReg
(26,253 posts)covid 19 epidemic raging across India (and probably across the entire subcontinent.
My heart goes out to all, and I wish the best for all in these perilous times.
peoli
(3,111 posts)SWBTATTReg
(26,253 posts)peoli
(3,111 posts)peoli
(3,111 posts)Fauci mentioned Covaxin on CNN today
SWBTATTReg
(26,253 posts)LisaL
(47,420 posts)NT
JI7
(93,575 posts)is vaccinated first .
Hortensis
(58,785 posts)of India's giant second wave and is no doubt already being rethought. It has 100% efficacy against severe cases and is desperately needed right there.
I can understand pride and enthusiasm for this new vaccine, though. A huge contribution to the world.
SWBTATTReg
(26,253 posts)they are reconsidering plans / redirecting their focus on more urgent needs at home.
JI7
(93,575 posts)RockRaven
(19,306 posts)How do you think other vaccines work?
peoli
(3,111 posts)Ms. Toad
(38,607 posts)Neither the mRNA nor the adenovirus vaccines are.
(Yes - ultimately all teach the immune system to make antibodies, but they do it by different mechanisms. The mRNA is the newest (never before used as a vaccine), and the adenovrus vector is the next newest (it is used in some influenza vaccines, but it has been used less than a decade.)
uponit7771
(93,532 posts)womanofthehills
(10,988 posts)Not the entire virus. Small study (800 people total ) out of Israel last week said Pfizer vaccinated people with Covid had higher levels of African strain than non vaccinated with Covid) Therefore they need boosters for the new variants. I think I will wait for that vaccine too - it should have a wider range of protection from variants.
LisaL
(47,420 posts)after vaccinating their population with Pfizer.
But you sit there and wait for something that might never come, what do I care.
womanofthehills
(10,988 posts)variants. Most days, my whole county has zero cases. VAERS on Friday listed over 40,000 reported cases of mild to severe anaphylaxis from the current vaccines.
Explaining how Covaxin could be effective against the variants, former chief epidemiologist of the ICMR, Dr Raman Gangakhedkar, said it targets the entire virus, and not just a few parts. Covaxin is a whole-virion inactivated coronavirus vaccine; it uses the entire inactivated virus particle. Many other vaccines use only the spike protein to produce an immune response. The virus has multiple components, spike protein is just one of them.
Read more at:
https://economictimes.indiatimes.com/industry/healthcare/biotech/healthcare/covaxin-works-on-brazil-south-africa-strains-initial-findings-show/articleshow/81443494.cms?utm_source=contentofinterest&utm_medium=text&utm_campaign=cppst
LisaL
(47,420 posts)But if you want to wait, it's no skin off my nose.
Hortensis
(58,785 posts)though (100% against severe disease!), makes me wonder if it would achieve herd immunity on its own. Perhaps used along with other vaccines available to a society. It requires two doses and only normal refrigeration.
And is desperately needed right now in India.
With the more communicable new variants, my husband and I are still masking and avoiding closed public spaces even with the 91.3% of Pfizer against getting infected with Covid at all. That's nearly 1 out of 10 vaccinated still able to spread it.
Ms. Toad
(38,607 posts)The 5,800 breakthrough infections include 396 hospitalization and 74 deaths.
Hortensis
(58,785 posts)normally reputable. "100%" usually means effective rather than literal.
Ms. Toad
(38,607 posts)More recent data indicates it is not 100%.
Frankly, it's another disagreement I have with public health pronouncements about COVID. They shouldn't have claimed it in the first place - once you make a claim it is hard to walk it back - and it makes people skeptical of anything they say later. But that was the claim before real life data came in - so now they are having to walk back another claim that was made, at least in part, to overcome resistance to vaccination (or mask wearing, in the past). Hope it doesn't backfire here, as it did with the mask backlash..
Here's a report on the more recent data. (The best report is behind a paywall)
https://www.businessinsider.com/infected-after-covid-vaccination-cdc-numbers-breakthrough-infections-2021-4
Looks to me like the death rate in breakthrough cases (1,3%) is only a bit lower than the death rate for anyone else who gets COVID (roughly 1.8% - calculated by dividing US deaths/US cases). That's about what I would have expected. It's just that the vaccine means 95% or so of people exposed don't get COVID 19.
Hortensis
(58,785 posts)developed for the Indian vaccine, but didn't look past that at what these terms are meaning now. Of course, right now in cities in India unvaccinated deaths are much higher than we've seen here. We're so fortunate.
Grim situation, and I'd do anything but stand in a long, crowded line to get Covaxin if I were there, and thank goodness they have it. I can't believe any will be sent overseas, but India currently has the kind of conservative populist government that's almost synonymous with fierce rejection of science and severe disease spread. So we'll see.
TraceNC
(254 posts)And of the 74 deaths, nine were "reported as asymptomatic or the patient died due to a cause not related to COVID-19." https://www.google.com/amp/s/www.thedenverchannel.com/news/national/coronavirus/cdc-breakthrough-rate-of-covid-19-cases-in-fully-vaccinated-people-is-0-00008%3f_amp=true
Ms. Toad
(38,607 posts)I find it hard to believe they were reported as connected to the breakthrogh cases if they weren't ultimately determined to be COVID 19 deaths.
But I can't find more details.
But since the vaccines were touted as 100% effective against severe disease and death, I think it is important to note that 74 deaths out of 5800 cases is 1.3% - not very far off from the number of deaths for any COVID infection.
In other words, the effectiveness in preventnig severe disease and deaths come more from preventing the disease than it does from reducing severity.
TraceNC
(254 posts)Seems like good protection if youre infected and test positive, and we have no idea how many asymptomatic infections there are among the fully vaccinated, so Id say the doctors and scientists know what theyre talking about in terms of protection against severe disease. Glad I got my shots. Ill leave it at that.
Source for the 396 number: https://www.google.com/amp/s/www.cnbc.com/amp/2021/04/19/cdc-says-there-have-been-less-than-6000-breakthrough-covid-cases-among-fully-vaccinated-americans.html
Response to TraceNC (Reply #30)
TraceNC This message was self-deleted by its author.
Ms. Toad
(38,607 posts)What they tested (prior to emergency approval) was reduction in symptomatic cases.
There have been at least 3 studies now that demonstrate equivalent protecton against infecton (i.e. they are testing everyone post-vaccination in the newer studies to see if they become infected, not just the symptomatic ones - which is what they tested in the qualifying trials.)
I'm much less interested in reduction in severity of symptoms (which only provides personal protection - and a reduced drain on medical resources) than I am in reducing infection (which is how we get to herd immunity - and get out of this mess). The vaccines make me happy - but to the extent the claim of 100% effectiveness against hospitalization or death is not proven false and discourages people from believing people who made those claims - the decision to claim 100% effectiveness as to death or serious disease does not make me happy
TraceNC
(254 posts)We are at 95,888,088 fully vaccinated now. Much better than I thought, adding to the already great vaccine news. https://covid.cdc.gov/covid-data-tracker/#vaccinations
Some people who are fully vaccinated against COVID-19 may still get sick because no vaccine is 100% effective. Last week, CDC released data on the number of breakthrough infections of people who, despite being vaccinated, still tested positive for COVID-19 more than 14 days after getting their second dose of a COVID-19 vaccine. However, as of last week, there were fewer than 6,000 breakthrough infections reported, which represents less than 1% of people who have been fully vaccinated. Of these, approximately 30% had no symptoms at all. Two recent CDC reports1,2 show that COVID-19 vaccines help protect people who are vaccinated from getting COVID-19 and may reduce severity of illness among people who get vaccinated but still get COVID-19.
https://www.cdc.gov/coronavirus/2019-ncov/covid-data/covidview/index.html
BumRushDaShow
(169,433 posts)By David Chang Published April 25, 2021 Updated 40 mins ago
An investigation is underway after eight classmates at an elementary school in the Lower Merion School District, as well as two family members who were fully vaccinated, tested positive for COVID.
A spokesperson for the district said eight students in a second grade class at Penn Valley Elementary School tested positive. The class has been quarantined since April 15 and so far officials have not seen evidence of linked or in-school transmission at Penn Valley beyond that one class, the spokesperson said.
The school district's health services team is consulting with the Montgomery County of Public Health in the investigation.
https://www.nbcphiladelphia.com/news/coronavirus/8-classmates-2-fully-vaccinated-family-members-test-positive-for-covid-in-lower-merion/2791754/
There is speculation that the cause was a faulty ventilation issue in that one classroom -
Link to tweet
TEXT
@MattPetrillo
The Lower Merion School District is investigating if a faulty ventilation system led to eight second-graders testing positive for COVID-19 https://philadelphia.cbslocal.com/2021/04/26/penn-valley-elementary-school-covid-19-outbreak-faulty-ventilation-investigation/
@CBSPhilly
Image
10:57 AM · Apr 26, 2021
By Matt Petrillo
April 26, 2021 at 12:59 pm
Filed Under:Local, Lower Merion Township news, Penn Valley Elementary School
LOWER MERION TOWNSHIP, Pa. (CBS) An investigation is underway after a COVID-19 outbreak at Penn Valley Elementary School in Montgomery County. Lower Merion School District officials say a faulty HVAC system may be to blame for the outbreak. Lower Merion School District Investigating If Faulty Ventilation Is To Blame For COVID-19 Outbreak At Penn Valley Elementary School.
Its since been fixed, but some Penn Valley parents are still concerned for their kids. Makes me worry a little bit just about the general parameters of what exactly if three feet and if the circulation is enough, Penn Valley School parent Sarah Gallo said.
Parents like Sarah Gallo want answers after learning eight students in a second-grade class tested positive for COVID-19 at Penn Valley School in Lower Merion. We hadnt seen an outbreak like this in a single classroom, Lower Merion School District spokesperson Amy Buckman said.
Buckman says the second-grade class was quarantined last week while the rest of Penn Valley School remained opened as officials tried to figure out what happened.What was found was a problem with the HVAC system.
https://philadelphia.cbslocal.com/2021/04/26/penn-valley-elementary-school-covid-19-outbreak-faulty-ventilation-investigation/
My issue is that you had SOMEONE (or someones) who was (were) positive at all... and ended up infecting others in a school and that this happened over 10 days ago and is only now reaching our local news.
I do know there is too much thinking among the populace that a vaccine is a complete "shield" from contracting the virus and all caution is thrown to the wind. No children (other than study participants) have been vaccinated at all yet they can be carriers and unfortunately the messaging to encourage people to get vaccinated is not really being calibrated correctly.
DontBelieveEastisEas
(1,211 posts)I suspect that if a person's immune response is poor that they might be the one that has a breakthrough case.
And since they have a weak immune system, they may have had extremely high hospitalization and death rates without the vaccine.
So, broken down by risk category of the patients with the breakthrough cases would be nice.
Ms. Toad
(38,607 posts)since there are only a few thousand cases. You'd have to have enough comparisons in the non-breakthrough cases to evaluate what made the difference (or even if there was a correlation).
I was always skeptical that the vaccines were reducing severity - but that was expressly what was tested. They only tested symptomatic people to determine if they had COVID. What they found was a reduction in symptomatic people (which would include a reduction in people with severe symptoms and death).
I think it is far more likely (which is being confirmed by recent data) that it reduces infection. (Now that they are testing for infection, even in the absence of symptoms.) If you reduce infection overall, you will also reduce severity and death. And - if all you are looking for is symptomatic disease you'll never find out whether it is reducing severity by reducing infection or by reducing syptoms.
DontBelieveEastisEas
(1,211 posts)I wonder if you get a dose of the Virus only 2 days after your final shot, and then present with symptoms 12 days later, would they call that a breakthrough case.
I have long thought that by day 11 or 12 after the first shot, you could probably 'catch' COVID and be tested at day 15 or 20 and thereby be considered a breakthrough case. Research that looks at cases can not know when the COVID was caught, other than it was likely 3 to 14 days ago, IMO.
TraceNC
(254 posts)Plus, what were these people doing and where were they going? Masks? No masks? Mostly with household members? Hanging out with groups? No telling, but I wouldnt be surprised to find out they had let their guard down. In any case, it wont matter to those trying to sow doubt about the vaccine.
DontBelieveEastisEas
(1,211 posts)Half a Million Dead
Millions Maimed.
And still they resist the vaccine because, doubt doubt doubt.
TraceNC
(254 posts)Im very new here as a poster but Ive lurked for years. I dont think Ive ever seen the kind of doubting of science thats occurring with these vaccines. At least it is limited, and not rampant here.
Ms. Toad
(38,607 posts)The breakthrough cases are only those that arise at least 2 weeks after the final shot.
The investigation form is pretty thorough - and has separate questions to sort out people who caught it up to two weeks after the final shot.
Here's some info: https://www.cdc.gov/coronavirus/2019-ncov/vaccines/effectiveness/why-measure-effectiveness/breakthrough-cases.html
DontBelieveEastisEas
(1,211 posts)Also, I did not see any question about WHEN the person suspected they caught the Virus in the, what I think is the, investigation form.
https://www.cdc.gov/vaccines/covid-19/downloads/COVID-19-Vaccin-Breakthrough-Case-Investigation-Form.pdf
I did see this,
Other reasons why fully-vaccinated people might get COVID-19
Its possible a person could be infected just before or just after vaccination and still get sick. It typically takes about 2 weeks for the body to build protection after vaccination, so a person could get sick if the vaccine has not had enough time to provide protection.
Case definition
"For the purpose of this investigation, a vaccine breakthrough case will be defined as a U.S.
resident who has SARS-CoV-2 RNA or antigen detected on a respiratory specimen collected
≥14 days after completing the primary series of an FDA-authorized SARS-CoV-2 vaccine.
An acceptable respiratory specimen includes a nasal swab, nasal wash, nasopharyngeal swab,
oropharyngeal swab, saliva, sputum, bronchoalveolar lavage fluid, pleural fluid, or lung tissue.
A case will be excluded from further investigation if: 1) they received a COVID-19
vaccine that is not authorized or approved by FDA; 2) the respiratory specimen that was
positive for SARS-CoV-2 RNA or antigen was collected
Ms. Toad
(38,607 posts)so stretching it to 14 days before your second shot would be way outside the norm.
But the questions designed to sort out earlier infections are the ones that ask about clinical illness and clinical course from between 2 days before and 14 days after the final injection.
In addition - immunity is not on/off. You don't magically become immune at shot 2 + 14 days.
For vaccines that require two shots (the bulk of breakthrough cases reported), by the time the second shot is administered the protection from Pfizer is already 90%. I can't quickly find a similar number for Moderna - but since they are both mRNA vaccines, with similar efficacy, it is likely to be pretty close to the same.
So - infection within a couple of days before or after shot 2 is effectively a breakthorugh infection, even though it may not technically be one. In other words - 3 weeks after Pfizer #1, you have as much immunity as after you are fully vaccinated with J&J.
Celerity
(54,335 posts)effective against the B.1.351 South African variant, so basically useless against it. In a few hours my wife and I get the 2nd dose in our variant (modified for the B.1.351 variant) tweaked Moderna vax trial here in Stockholm.
pnwmom
(110,255 posts)said they'd investigated all deaths and hadn't find any caused by an infection with the virus.
Ms. Toad
(38,607 posts)These are breakthrough COVID infections - and we all know infection with the virus that causes COVID can kill (upwards of half a million, so far)
Here is the data on breakthrough infections as of April 20 (from the CDC website)
As of April 20, 2021, more than 87 million people in the United States had been fully vaccinated against COVID-19. During the same time, CDC received reports of vaccine breakthrough infections from 45 U.S. states and territories.
Total number of vaccine breakthrough infections reported to CDC 7,157
Females 4,580 (64%)
People aged ≥60 years 3,265 (46%)
Asymptomatic infections 2,078 (31%)
Hospitalizations* 498 (7%)
Deaths 88 (1%)
*167 (34%) of the 498 hospitalizations were reported as asymptomatic or not related to COVID-19.
11 (13%) of the 88 fatal cases were reported as asymptomatic or not related to COVID-19.
https://www.cdc.gov/vaccines/covid-19/health-departments/breakthrough-cases.html
The data has apparently been updated since the earlier reports of 5800 breakthrough infections with 84 deaths.
Ms. Toad
(38,607 posts)and may convince those who are skeptical about long-term effects of the new(er) mRNA or adenovirus vector vaccines.
Unless you're going to continue to mask (preferably double) and never be inside unmasked with anyone other than those you live with until it arrives, I'd encourage you to get vaccinated with one of the others in the interim.
Disaffected
(6,391 posts)is a mistake. Your risk from Covid is far greater than the risk for any vaccine now available.
womanofthehills
(10,988 posts)Also, my zip code in NM has had one case in 90 days. With the mRNA vaccines you will be on a rollercoaster of new variant vaccines and this vaccine sounds more protective of variants.
LisaL
(47,420 posts)So you will be waiting, waiting, waiting and waiting.
mRNA vaccines do protect against variants. So I am not sure where you are getting the info that they don't.
womanofthehills
(10,988 posts)The South African variant of the coronavirus is notably more adept at breaking through the Pfizer-BioNTech vaccine than other variants are, Israeli scientists have found, in a first-of-its-kind real-world study.
https://www.timesofisrael.com/real-world-israeli-data-shows-south-african-variant-better-at-bypassing-vaccine/
LisaL
(47,420 posts)work against variants. Or Israel's number of cases per day wouldn't be under a 100 cases right now.
dsc
(53,387 posts)though I admit I also didn't know this existed. I see the advantage to it, but I am in a public facing occupation so I was unwilling to vaccine shop. I will say, I might have considered a week or two wait, but even that would have made me nervous.
TraceNC
(254 posts)Bantamfancier
(401 posts)roamer65
(37,950 posts)Crunchy Frog
(28,273 posts)especially the mRNA ones.
This new one might work better for places like India.
I certainly hope that you're not holding off on getting vaccinated right now.
It might never be approved in the US. They didn't have clinical trials in the US. There are lots of vaccines out there, not all of them are going to be approved in the US. So you will be waiting in vain.
I_UndergroundPanther
(13,369 posts)Covaxin even though you already fully vaccinated with Moderna?
LisaL
(47,420 posts)NT
Iggo
(49,916 posts)Its a fucking pandemic. Ill take what I can get an save lives now.