Imagine being able to get tested 4 times in one day, let alone getting the results for all 4 test on the same day as well.
Man, the US really is a hell hole. I've had two covid tests over the last few weeks (one as I had symptoms, another as I had to take my kid to a hospital for a routine thing). Both came back within the day, one of them within three hours.
No cost, testing centres all over the place, barely any lines both times.
Australia is a bucket of shit, but we seem to have this whole 'don't let everyone die' thing on lockdown.
they have rapid testing now where you get the results in like a few hours or sooner, places I saw around me were saying 30min. taking 4 tests is weird though, but I wouldn't be that surprised that new rapid testing has problems with some part of it.
If he got a negative first I doubt he would have demanded a second test. So I'm guessing he has it.
False negatives are common, false positives aren't. It's not rocket science.
Other way around isn't it? They are designed to have as low false negative as possible, a false positive means someone quarantines for two weeks without symptoms while a false negative means a covid positive person is acting like they don't have it.
You'd hope so, but that's not how science and stuff works. The test sees covid; it tells you. (As far I know)
You are correct in this case, it seems like the current antigen tests have a high false negative rate.
"What about accuracy? The reported rate of false negative results is as high as 50%, which is why antigen tests are not favored by the FDA as a single test for active infection. " -Harvard.edu
I've read from a few different places over the past few months that the rapid same day tests have a false negative rate of upwards of 50%
Exactly, but if it says you have covid... you have covid. Not saying it can't give false negatives
A false negative means you have it but the test shows that you don't, no?
Edit nevermind I misread
while a false negative means a covid positive person is acting like they don’t have it.
big difference between literal false negative and practical one
virus count drops quickly. Many people are undetectable by the time they start feeling sick. If the tests repeatedly come up negative, that means YOU ARE NOT SHEDDING VIRUS, even if you have COVID.
It's technically a false negative in that you have COVID and you tested negative. But it is practically, for the purposes of contagion and controlling the epidemic, the same thing as being ACTUALLY negative and COVID-free.
By the time illness actually comes on, roughly 50% of people will already have undetectable levels of virus in their body. I got tested 1 week after I felt sick, 3 times within the month that I got sick, and 13 times in the few months after that. Literally every single one came up negative, and I definitely had COVID.
A covid test would be designed to have more false positives though, it's better to have person without covid quarantining themselves than a person with covid running around infecting people.
Yes but thatst he weakness of the rapid antigen test. False negatives happen.
Sometimes I'm amazed at how stupid Elon Musk is. He got into Stanford, right? (but couldn't hack it)
it's really incredible considering how all the propaganda paints him as basically Tony Stark
I would be so happy if he died from covid as unlikely as it would be.
They're definitely not great for this type of test. Rapid Ab testing suffers from high cross-reactivity, which causes a high false-positive rate.
A good ELISA kit will take hours to run and result.
The test I had made when admitted in the ER was such that the doctor was yelling across the hall "the only binding result for us is a positive one" so I guess my test had a larger false negative rate.
I mean that's the thing about statistical evaluation of lab work.
Just because it has a higher false positive rate doesn't mean negative results are wrong. It means you probably want to follow up with a more precise test, instead of doing the rapid 4 times in a row because Elon Musk asked you to.
I mean, for me the test was just to say whether I could be placed on a regular ward or in the corona ward.
Tfw you're an engineering god amongst men to your adoring dork fans and can't figure out how statistical probability works.
I can't help but wonder if BD just threw in a random number generator into their BD Veritor antigen test machine and called it a day. Notably they don't provide accuracy stats, and it certainly seems like it was pushed into the market quickly:
- This test has not been FDA cleared or approved;
- This test has been authorized by FDA under an EUA for use by authorized laboratories;
- This test has been authorized only for the detection of proteins from SARS-CoV-2, not for any other viruses or pathogens;
https://www.bd.com/en-us/offerings/capabilities/microbiology-solutions/point-of-care-testing/bd-veritor-plus-system-for-rapid-covid-19-sars-cov-2-testing
Also would describe this "article" / press release as science, the wording is very careful:
https://www.medtechdive.com/news/bd-says-its-antigen-test-on-par-with-quidels-pcr-in-head-to-head-study/584971/
