Coronavirus

Researchers are still working to understand the complicated and debilitating condition dubbed long COVID

A combination of human behavior and immunity, the environment, and SARS-CoV-2 itself explains why the virus surges during both hotter and colder months

When scientists exposed people to the virus that causes COVID, only a subset got sick. Studying them could offer clues to immunity

The first large trial of a COVID and flu vaccine combo suggests it boosts immune protection even more than single-target shots

COVID numbers are low, but some evidence suggests they could be rising. Here’s how to protect yourself this summer, according to experts

Attacks on Anthony Fauci over guidance on masking and social distancing issued during the COVID pandemic ignore the science on viral spread

Congressional representatives grilled Anthony Fauci, former head of the U.S. National Institute of Allergy and Infectious Diseases, about the government’s early response to the COVID pandemic

Anthony Fauci, who led the National Institute of Allergy and Infectious Diseases early in the COVID pandemic, is facing a congressional committee about questionable e-mails from agency officials

People may someday have a surprisingly familiar tool to prevent viral infections: one of the antibiotics found in a common ointment

A Dutch man with lymphoma and other blood disorders was infected with the COVID-causing virus for nearly two years, during which time the pathogen evolved numerous mutations

A recent study suggests that Paxlovid is ineffective at treating symptoms in people with mild illness or those who have been fully vaccinated. It is still a lifesaving medication in vulnerable groups

Studies show that vaccination against COVID during pregnancy provides a powerful safeguard for vulnerable infants too young to receive the vaccine on their own