What We Know About the ‘Stealth’ BA.2 Omicron Variant

As the Omicron coronavirus surge subsides, researchers are keeping an eye on a highly transmissible subvariant known as BA.2. Many epidemiologists suspect that it may reverse the decline of cases in the United States, but doubt that it will cause a large new spike. Here’s what we know so far about BA.2. It’s not really … Read more