What we do and don’t know about new COVID mutations
Vaccination campaign picks up speed around the world
4 January 2021No decision on Moderna vaccine on Monday: EU regulator
4 January 2021What we do and don’t know about new COVID mutations
The emergence in Britain and South Africa of two new variants of SARS-CoV-2, which are potentially far more infectious versions of the virus, has prompted widespread concern. Here is what we know—and what we don’t—about the mutations.
