Mix-and-match Covid boosters are as good–if not better than–all the same shots(arstechnica.com)
arstechnica.com
Mix-and-match Covid boosters are as good–if not better than–all the same shots
https://arstechnica.com/science/2021/10/mix-and-match-covid-boosters-are-as-good-if-not-better-than-all-the-same-shots/