The "science" said this about corona, and taking the vaccine.
Lies. In fact, scientists from the get-go insisted that there was insufficient evidence to say to what extent the vaccine prevents transmission (hence the CDC kept the mask mandate going for a while). Hypocritically, *you* were calling out this hesitation as a “proof” that the vaccine doesn’t work with a classic all or nothing strawman.
Truthfully it *did* protect against infection and transmission at a much higher rate than they gave it credit for, but waning immunity and Omicron are significantly weakening that effect. Still, vaccination *does* prevent a very large amount of Omicron infection (and therefore transmission) even according to the most pessimistic analyses of the data we have, albeit at a much lower rate than previously.