See also this question, which asks the same question and comes with a $1000 bounty for the best answers: https://www.lesswrong.com/posts/fBGzge5i4hfbaQZWy/usd1000-bounty-how-effective-are-marginal-vaccine-doses
See also this question, which asks the same question and comes with a $1000 bounty for the best answers: https://www.lesswrong.com/posts/fBGzge5i4hfbaQZWy/usd1000-bounty-how-effective-are-marginal-vaccine-doses