CHICAGO — They came hoping for Beyoncé. They left with Covid. Fresh off of a jam-packed week of Democratic National Convention events, reports of attendees’ testing positive for Covid are rolling in.

Possible risk of autism in children. Dormant cancer cells awakening. Accelerating aging of the brain. Federal officials in May 2023 declared an end to the national COVID pandemic. But more than two ...

The Covid-19 pandemic has been perceived mainly as a dangerous acute outbreak of infection that killed more than a million people in the United States and 7 million worldwide. 1,2 However, in the ...

A sweeping new definition of long COVID could help affected people get recognition of their condition and improve diagnosis and treatment. The U.S. National Academies of Sciences, Engineering and ...