Heard pod regarding testing.
They looked at chance of getting a false negative test.
First day after infection, the false negative rate is 100%. It drops from day 2-4 from 90s to 68% chance you’ll still get negative test on day 4. On day 5, which is the average day first symptoms occur, you still have 38% chance of a false negative.
From day 6-8 after infected, you bottom out at 20% of false negative test on day 8 after infection. So three days after symptoms start.
After that, false negatives go back up as your immunity system kicks in. That seems problematic as most people report day 7 or 8 after symptoms start as when it starts to get scary or more severe.
By that point the false negative rate is already rising again if you present to ER. No exact percentages were given, but they start rising from 20% false negative on the third day after symptoms start, so by a week after first symptoms, with your immune system fighting it, there is probably a decently higher than 20% chance of greater false negatives 3-5 days after the optimal third day.
That’s confusing but third day after symptoms is best time to get test. Early worthless. After sick a week, probably at least a third chance you’ll get a false negative. I’ve known two people who tested negative after being sure they had it and doctors convinced. 72 year old woman. 50ish guy. Both with that extreme exhaustion and short of breath. Neither got tested until probably a week after start of symptoms. I would guess this is the norm as most people aren’t going to seek test with mild symptoms. But if you’re at all high risk or want to know, go get a test on third day after first symptom. Loss of taste or whatever. That’s your best bet.
So basically the takeaway is the testing sucks pretty hard. You’re basically still at almost 70% the day before symptoms start and almost 40% to get a false negative day symptoms start. So if you get sick, your best chance at a diagnosis is about 3 days after you get sick, in which case you have an 80% chance to be correctly diagnosed. After that it gets worse again. That seems like one shit test.
Anyway, thought I’d pass it along in case anyone gets exposed to someone and thinks they’ll get ahead of the illness and get tested. Pretty worthless to do so. I hadn’t heard or read that information anywhere.
It also shows why this fucker is so contagious as they also found virus shedding is most prevalent right before symptoms start, yet there would be a damn near 70% chance you’d still get a false negative at that point where you’re most contagious.