Michigan, Mississippi and Louisiana and San Francisco join Texas in easing mask mandates and other coronavirus restrictions.
"At this level of cases with variants spreading, we stand to completely lose the hard-earned ground we have gained,” said CDC Director Dr. Rochelle Walensky.
The Centers for Disease Control and Prevention is reporting two COVID-19 outbreaks that originated in fitness center classes.
Local teachers unions say their areas face unique challenges when it comes to resuming in-person classes. But many districts have proven they can reopen safely.
Improper mask use, poor ventilation, and staff and guests failing to stay home when ill may have contributed to outbreaks linked to gyms in Illinois and Hawaii.
Guinea has so far recorded up to 10 suspected cases of Ebola and five deaths.
New guidance suggests in-person schooling is safe for kids and teachers despite the ongoing COVID-19 pandemic.
Those exposed to the coronavirus still should practice social distancing and watch for symptoms, the CDC said in its updated guidelines.
Wearing a cloth mask on top of a surgical mask blocked about 80% of particles, researchers found.
Officials are on edge about fans congregating at parties and bars for the big game.