3,472 followers
@EphemeralEther @equisetum71 @VGrubsky @BallouxFrancois @MichaelSFuhrer @OmicronData @DrJBhattacharya .. what threshold. This was very rarely done. But there was this one (which found about 20% didn't seroconvert). But the test kits and thresholds used var