With the BA.2 Omicron subvariant now the dominant strain in the U.S., there are concerns of another COVID-19 surge this spring. Jackson Proskow looks at the push to get Americans to take a fourth dose of the vaccine.
- COVID-19 cases on the rise in the U.S. after two-month decline
- Omicron COVID-19 variant ‘less severe’ than Delta for kids under 5, new U.S. study says