What the new booster shot tells us about COVID

Michelle Barron, professor of medicine, CU School of Medicine: “This is what we do with flu every year. For people who say this is weird science we’ve never done this. We do this every year. Every year we look to see lots of different strains of flu circulating. Not just one. When they develop the flu shots, which ones do they think based on predictions and modeling is going to be the one we should include because you are going to get exposed to this.”