'Mix and match' Covid vaccine boosters are effective, NIH study finds
The research will be presented Friday to the Food and Drug Administration's advisory committee as it reviews data about Moderna and J&J booster shots.
Yes. The UK had to do that out of necessity and it works. They also, for to their first shot first policy to get more people the shot. They found that longer intervals between the first and second shot provided stronger immunity. The first shot provided immunity for much longer than the 3 week internal protocol in the US.