That's not a blanket statement that can be made, as the data is still coming in. https://www.cidrap.umn.edu/news-perspective/2020/12/fda-analysis-details-suppo

That's not a blanket statement that can be made, as the data is still coming in. https://www.cidrap.umn.edu/news-perspective/2020/12/fda-analysis-details-support-moderna-covid-vaccine#file-69251--2:~:text=He%20said%20the%20findings%20reflect%20an,support%20this%20key%20benefit%2C%22%20he%20said https://www.cidrap.umn.edu/news-perspective/2020/12/fda-anal.... > He said the findings reflect an impact on blocking transmission and are very encouraging, hinting at mucosal immunity. "The data aren't conclusive but support this key benefit," he said. Of course, if in the end vaccines don't prevent transmission, then they don't prevent transmission. But we don't know that they don't do that.