Child mortality has been halved in the last 25 years. Building on this progress, new innovations in immunization are working ...

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.

Waking up in the middle of the night is common. However, if it occurs often, it may signal the presence of an underlying condition. Sleep apnea, anxiety, and needing to urinate can all cause ...