Thanks for the insights! >A "confirmed reinfection" for someone who previously had Covid requires them to have gotten sick, tested positive, have the virus seq

Thanks for the insights! >A "confirmed reinfection" for someone who previously had Covid requires them to have gotten sick, tested positive, have the virus sequenced, then later get sick, test positive, get the virus sequenced again, and have the sequences demonstrate that the infections were caused by distinct virus variants. This is indeed quite a high bar for classification compared to classifying breakthrough cases. >This is because it is often impossible to tell if someone who appears to be reinfected is suffering from a relapse but never cleared the virus, is suffering from "long Covid", or otherwise falsely tested negative without fully recovering. It would be interesting to see what the reinfection case numbers look like with a more loose classification method that assumed a margin of error for such false positives. >Lastly, immunity isn't some black box. To what degree is it a gray box though? Or is it white box?