COVID-19 vaccines are incredibly effective at preventing infection, but like other shots to protect from other diseases, the defense is not 100% impenetrable. When a person has been fully vaccinated ...

A total of 37 states show growing or likely growing infections as of July 22.

Add Yahoo as a preferred source to see more of our stories on Google. COVID-19 numbers are rising in Massachusetts, and in states across the country. The CDC website has evaluated the issue in each ...

The summer surge of COVID-19 continues with new federal data showing the virus is on the rise in many parts of the country. The U.S. Centers for Disease Control and Prevention (CDC) reported that ...

Sara Moniuszko is a health and lifestyle reporter at CBSNews.com. Previously, she wrote for USA Today, where she was selected to help launch the newspaper's wellness vertical. She now covers breaking ...