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Perhaps I'm misunderstanding but is it not 40-60% effective if well matched and 0% effective otherwise? Flu shot efficiacy is typically under 50% so if they gu

Perhaps I'm misunderstanding but is it not 40-60% effective if well matched and 0% effective otherwise? Flu shot efficiacy is typically under 50% so if they guessed the wrong strains you happen to be exposed to that season it is totally worthless. There seems to be a common misconception that it will somehow help you even if they guessed the wrong ones but I'm not sure why that is so prevalent. If there are 5 viruses, and they got 4 of them, you still have 0% protection against the missing one. I don't know why COVID would be any different.

peteradio 4y ago
> https://www.cidrap.umn.edu/news-perspective/2017/02/studies-shed-light-effects-serial-flu-shots-current-vaccines-benefits https://www.cidrap.umn.edu/news-perspective/2017/02/studies-... Some years it nets highly negative efficacy depending on your previous years vaccination (see 2014 flu).
Markoff 4y ago
you are understanding it correctly, if they are well matched (if lucky) they have at best 40-60% efficacy, if they are NOT well matched (if not lucky) their efficacy is somewhere between 0-40%, simple as that, but these pro-vaxxers will ignore science if it doesn't suit their interest