> The callouts there are "complete escape [from] convalescent plasma" (prior exposure won't help you) Whether prior exposure helps also depends on T-cell respo

> The callouts there are "complete escape [from] convalescent plasma" (prior exposure won't help you) Whether prior exposure helps also depends on T-cell response. At this point it's well established that immunity lasts for some unknown period of time past when most antibodies have left the bloodstream.