Q: If not, what happens, do we need a new, different vaccine?” A: The vaccines developed thus far will likely have efficacy against the different SARS-CoV-2 variants although the level of efficacy may be reduced to the South Africian variant (B.1.351). More clinical data will be needed to understand the levels of protection against new …

A: Anaphylaxis is a severe allergic reaction that is very rare after the COVID19 vaccine. People who have had a severe allergic reaction to a prior dose of the mRNA COVID19 vaccine should not get the second dose. If someone has had anaphylaxis to something else, they can still get the shot. Most people do …