> an endemic virus But COVID-19 wasn’t endemic at the time that proof-of-vaccination requirements were commonplace. An endemic infectious disease has stable lo

> an endemic virus But COVID-19 wasn’t endemic at the time that proof-of-vaccination requirements were commonplace. An endemic infectious disease has stable low-level incidence within a defined population. Nothing about the early stages of the COVID-19 pandemic when such restrictions were in place fits that description. In any case, I was asked many times for proof of vaccination; but I don’t live in the U.S. so possibly the implementation compliance differed.