ToungeInCheek since 2010
5 Year Member
This schematic goes well with testing. The exact SARS-CoV-2 timeline has yet to be worked out. But red line is what the RT-RPR test is going to detect. You get an idea of the window in which infection can be determined to be active.
Also show you why antibody testing doesn't do any good for monitoring disease with goal of self-quarintine/isolation and contact monitoring. It won't be detected until viral spread (day 5 in this diagram) threat is mainly over.
IgM tests often lack as good as specificity as an IgG test, because they are less specific antibodies in general. But you see they peak first at roughly day 15.
IgG peaks latest and has ability to be lasting. Are they good antibodies for protection? That is the question.