good point, the study does not do fixed time intervals and tests all participants. Skimming the literature I've seen likelihoods reported of being covid positiv

good point, the study does not do fixed time intervals and tests all participants. Skimming the literature I've seen likelihoods reported of being covid positive and having no symptoms between 13% and 45% (and evidence that says they don't infect vs some that says they do..) > But we're not shutting society down every year for flu, are we? I'm sorry, but have you seen hospitals being overwhelmed by the flu as they are by covid on the same scale? I admit I'm biased here because a friend of mine is an ECMO specialist and he has seen nothing like this before. I don't see the case you describe as unlikely. Unless I'm misinterpreting efficacy, even with everyone vaccinated today, 2+ million people could still get covid in taiwan, assuming the same rate of transmission etc. However if the efficacy was overestimated, maybe due to time and less potential exposures to covid, I don't think we would see a complete restoration in efficacy after a booster was given? Personally I think 70% overall as more likely and at least in my social bubble there are no expectations about a "sterilizing immunity". It mainly boils down to "less likely to die / be hospitalized and better protect those that are vulnerable". But I get that some outlets spread the expectation of absolute immunity, I believed that might happen when I first heard of a 90+ efficacy.. Fauci and Drosten at least have started to manage expectations in that regard, that most vaccinated people will eventually get covid, which should further boost their immunity.