Precautions to be taken against COVID-19 and monkeypox and the possible spread of polio

The CDC is expected to update its COVID-19 guidance for schools in the coming days. Meanwhile, the Biden administration has declared monkeypox a national emergency. And 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.