A vaccine can't have a sample size. A study can have a sample size, but I'm not aware of any that have administered hundreds of millions of doses. If you're ref

A vaccine can't have a sample size. A study can have a sample size, but I'm not aware of any that have administered hundreds of millions of doses. If you're referring to the general rollout of the vaccine, then that is not a randomized, controlled trial. And IIRC, the "wonderful chart" you're referring to (I assume you mean PCR positive tests or "cases") can not be credited to the vaccine rollout. It peaked when only 8 million doses had been given, and the age distribution of the decline in cases did not match the vaccine recipients' age distribution [0]. --- [0] https://www.msn.com/en-us/news/us/covid-19-cases-plunging-too-quickly-to-be-credited-to-vaccine-rollout/ar-BB1dL6Oa https://www.msn.com/en-us/news/us/covid-19-cases-plunging-to...