We got the first round of results from the Moderna booster trial (here is the study and here is the press release). Booster shots A few months ago, Moderna started its Phase II trial with booster shots designed against the two similar variants of concern: B1.351 (S. Africa) and P.1 (Brazil). Specifically, they are testing three booster shot strategies:
Moderna booster works!
Is the expectation that a booster will only be effective if the original vaccine was from the same manufacturer or at least mRNA vs adenovirus?