Long COVID affects millions worldwide, leaving people with fatigue, breathlessness, and brain fog. A new review suggests ...

Why some people experience long-lasting physical and mental effects from COVID-19 could be linked to chronic inflammation, ...

Researchers are striving to understand the impact a phenomenon known as original antigenic sin has on immunity to the virus.

Tis the season for sniffling, coughing and calling out of work. Here's what to know about the pathogens circulating in the ...