Gold Dragon
Well-Known Member
This may be so, but it does not explain why our CDC experts stated outright that they were not interested in this sort of testing early on. I suspect there is no good reason for their dismissive attitude.
Serology testing is not useful to detect infection because it becomes positive too late. It is useful for detecting immune response but has limited use at this stage.
Probably its most immediate use is identifying candidates for convalescent plasma therapy which has some applications in severe cases but not without its problems (cost, scalability, transfusion reactions).
Detecting asymptomatic spread in the community after the fact is somewhat useful to strategize ways to reduce community spread and improve the accuracy of models.
But using it to identify immunity for return to work is actually not possible right now because of two key questions we don’t have enough information to answer. 1) what level of antibodies gives is immunity if any level does? 2) how long does that immunity last?
It will be a while before those two questions can be answered and we will have to depend on data from China and S Korea about reinfection rates since they were the first countries to have cases.