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.

In April, the CDC’s influential Advisory Committee on Immunization Practices recommended expanding RSV vaccination to ...

It was 1959 and Duguay, of Clearwater, Florida, had polio. It mostly preyed on children and was one of the most feared ...

Within one to two weeks, the cough becomes more intense — harsh, violent fits that leave you gasping for air. Sometimes, a ...