It’s not clear what kind of antibodies they’re testing for, but it can take up to 4 weeks after infection to develop detectable levels of antibodies. It takes o

It’s not clear what kind of antibodies they’re testing for, but it can take up to 4 weeks after infection to develop detectable levels of antibodies. It takes on average ~3 weeks after infection to die. There needs to be some time lag adjustment in your calculation, which would likely result in a lower IFR. IMO the two effects probably about cancel each other out and we’re looking at <1% IFR for the population tested (AFAIK children weren’t included).