This also came out today. http://publichealth.lacounty.gov/phcommon/public/media/media...
We really have no idea what the IFR is, just that is probably in the .1% to 1% range.
Also, it takes around 2 weeks to develop antibodies, so the tests are showing how many people had covid 2 weeks before testing.
That antibody timeline was an estimate derived from data obtained from the "original" SARS virus, but it isn't accurate with the SARS-CoV-2 virus. IgM antibodies are present within hours of the onset of symptoms, and IgG antibodies after a few days.
Sure, find any manufacturer of rapid antibody test kits and look at their documentation for a nice trailhead into plenty of literature about antibody response times with this virus.
