Who has had a covid antibody test?

[marmar]

Little signs lead me to believe I might have been infected back in February, so I'm going to get one this week.

[blaze]

1. I had one.

Thought I may have contracted it back in Feb as well. Came back negative. I think I've since read that the antibodies may not last very long? Don't quote me.

[marmar]

2. I read that too.

[marlakay]

12. I also read that

Because they are giving out free tests in my town but I thought I had in December.

They won’t let us get covid test unless you are sick. My step daughter wanted my husband to get test to see her baby but doc said no. Hubby not happy missing first year of her first child. She lives out of state so not like we can peek in window. Videos not the same as holding them. Tough year!

[FreeState]

13. There was a study that says 3 months 90% have

less than 70% of them left. The anti-body test looks at range - if the study is correct most people won't show anti-bodies in the test after 3 months.

https://www.reuters.com/article/us-health-coronavirus-antibody-idUSKBN23T1CJ

[Aristus]

3. Twice. Both negative.

Despite seeing COVID and potential COVID patients in clinic nearly every day. Masks work. Use them.

[blaze]

4. Yes sir!!!

Is this part of your long weekend?

[Aristus]

9. No. That starts on Thursday.

Looking forward to it...

[Kali]

5. not very accurate

my understanding

[Celerity]

20. Not true at all for the Roche test

The Roche antibody tests are 100% accurate if it shows a positive and 99.8% if it shows a negative.

[Kali]

22. is it widely available?

what I am reading says just released last month and only 20 labs...

edit: I see labcorp has it and over 200 locations

edit again: this seems to take a bit of an issue with the accuracy claims - https://www.sciencemediacentre.org/expert-reaction-to-phe-laboratory-evaluations-of-roche-and-abbott-antibody-tests/

[Celerity]

23. It certainly is here in the EU and is FDA approved in the US.

It's the main one I would demand. My wife and I are in a trial study group for antibody reduction levels and 3 plus months from the calculated infection date (we had no symptoms) of mid March we have no signs of reduced antibodies either.

[Kali]

24. couple of edits to my original reply

[gopiscrap]

6. me

[The Velveteen Ocelot]

7. My brother had one; it was negative.

He had what seemed like a very nasty cold or flu in late February, at a time when no cases had been reported in our state. Later, when there were reports that the virus might have been here sooner than we thought, he got to wondering whether he had it, so he got tested last week but his antibody test came back negative. It probably was flu after all.

[LisaL]

8. There was a nasty flu going around this winter.

I know a bunch of people who got it. Influenza A.

[PCIntern]

10. I did

I think it was a false negative

[FreeState]

14. 50/50 chance its wrong

Last edited Mon Jun 29, 2020, 01:40 PM - Edit history (1)

Not sure if they have improved.


https://www.reuters.com/article/us-health-coronavirus-antibody-idUSKBN23T1CJ

Antibody tests used to determine if people have been infected in the past with Covid-19 might be wrong up to half the time, the US Centers for Disease Control and Prevention said in new guidance posted on its website.

Antibody tests, often called serologic tests, look for evidence of an immune response to infection. “Antibodies in some persons can be detected within the first week of illness onset,” the CDC says.

They are not accurate enough to use to make important policy decisions, the CDC said.

[Laffy Kat]

16. We were told the one our clinic uses is 99% accurate. nt

[FreeState]

18. They told you that but it doesn't make it true

Unfortunately sensitivity of the test is only one aspect.


https://coronavirus.medium.com/a-99-accurate-antibody-test-8e404339f29a

The probability that an antibody test can correctly tell you whether you ever had Covid-19 isn’t just dependent on specificity or sensitivity, but also the prevalence of the disease — the proportion of people who are actually sick — in the population being tested. Both Irfan and this Scientific American explainer have really clear and solid breakdowns of the math behind this idea, but this quote from the latter story sums up how the Abbott test would fare in a population where the prevalence was 1% (and remember, prevalence can vary greatly by region):

What if there were a nearly perfect test with 99% sensitivity and specificity? Seems awesome, doesn’t it? If that test were used in a country with 1% prevalence, then the predictive value of a positive test would be only 50%— a coin toss!

Despite these odds, Abbott’s test is becoming available in some places, like at CityMD Urgent Care Clinics in New York City. But by now you may be wondering what the point of getting antibody testing is, since even the most accurate test on the market can’t tell you with complete certainty whether you had Covid-19 or not, and having antibodies doesn’t necessarily mean you are immune to the virus.

[Celerity]

21. The Roche test is 100% accurate for a positive and 99.8%

if it shows a negative.

[curlyred]

11. My daughter - negative

She is a case manager at a hospital. She and a coworker were quite ill in late January/early February. Classic COVID symptoms including the lost sense of taste and smell. Her coworker's husband had similar symptoms after traveling home from a conference in New York City where he met with people from all around the world, including China.

She had the test at a hospital and it came back negative about the same time we started hearing reports that the antibodies may dissipate after a few months.

[Laffy Kat]

15. I have. I work at an HMO, patient-facing.

So many of my co-workers thought they'd had Corona and we can get the tested for free, so why not? I was put on isolation way back in April for a URI and I had a negative covid test at that time, so I could go back to work earlier. The antibody test a couple of weeks ago was also negative and so were all my co-workers'. We did have quite a few in the clinic that had covid and a few in the hospital, two on a vent, but none of the employees that I work with directly. In a way, I wanted to test positive just to know I have it behind me, but no such luck. I'm being very, very careful until the vaccine is available. Good luck to you!

[Coventina]

17. My husband had one: it was negative.

He donates blood, so the test is given as part of the process.

[roamer65]

19. I have.

Negative.