What’s Holding Up New Omicron Vaccines?
All the vaccines we use to ward off SARS-CoV-2, the virus that causes COVID, share one crucial feature: they were designed to protect against its ancestral form, which surfaced in Wuhan, China, more than two years ago. Today’s virus, however, is not the same as it once was. SARS-CoV-2 has been evolving, with successive variants … Read more