Second COVID-19 booster: What to know about 4th shots as the BA.2 variant spreads
Here’s who should get a second booster, according to new guidance from the CDC.
Since the beginning of the year, the BA.2 variant of the coronavirus has spread around the world, leading to major outbreaks in Europe and China. BA.2, a subvariant of omicron, is already widespread in America and is set to become the dominant strain of the virus here next month.