Experts are worried that despite the hard-won lessons of covid, we are not fully prepared for the next pandemic.

A contagious new COVID-19 variant called NB.1.8.1, aka "Nimbus," is now dominant in the United States, CDC data show. What to know about symptoms and vaccines.

Boston COVID-19 patient fights to breathe again On April 14, Jim Bello was disconnected from the ventilator and began breathing on his own for the first time in 32 days. April 27, ...