There's a new omicron subvariant taking over: BA.5. Scientists expect it will soon be responsible for most COVID-19 infections. But how dangerous is it? And what protection can vaccines offer?
There's a new omicron subvariant taking over: BA.5. Scientists expect it will soon be responsible for most COVID-19 infections. But how dangerous is it? And what protection can vaccines offer?
Massachusetts health officials have reported 9,047 new breakthrough COVID cases over the last week, and 47 new deaths in people with breakthrough cases.