Precautions to take against COVID-19 and monkeypox, and the possible spread of polio

The CDC is expected to update COVID-19 guidelines for schools in the coming days. Meanwhile, the Biden administration declared monkeypox a national health emergency. The New York Department of Health has warned of the possible spread of polio. Dr. Jeremy Faust, an emergency physician at Brigham and Women’s Hospital, explains how Americans can protect themselves.