> Furthermore, why are the medical industry wasting vaccine supply on people who are already immune due to surviving their infection? Suppose you're running a

> Furthermore, why are the medical industry wasting vaccine supply on people who are already immune due to surviving their infection? Suppose you're running a vaccine clinic. It's infinitely easier to check prospective patients for their bare demographic facts -- age, residence status, etc -- than it is to first administer an antibody test to see if they qualify for the vaccine. At best, you'd stretch supplies by 1/(1-seroprevalence), so maybe 30-40%. But in turn, you'd need to take multiple steps to verify patients, and you'd likely lose some along the way who would otherwise qualify (just from the hassle or multiple contacts).