Carmel Wroth

The federal health agency released new guidance for when Americans need to mask up indoors, saying about 70% of the population lives in a place where it's safe to go mask free.

What's the U.S. doing to watch out for the omicron variant? Here's the work underway and the challenges that experts say may slow down the country's efforts.

Kids ages 5 to 11 will soon be able to get Pfizer's low-dose COVID vaccine. CDC director Rochelle Walensky agreed with a unanimous decision of a team of advisers that the benefits outweigh the risks.