A study of incarcerated people in Connecticut finds that high levels of COVID exposure may reduce immunity from vaccines or prior infection.

"COVID-19 still generates substantial additional risks of health loss even in the second year after infection."

Additional COVID-19 vaccine boosters could benefit people with cancer, depending on the treatment they're receiving, researchers report.

"...by getting boosted you are in the population that has the highest level of antibodies in the mom, and also the highest level of antibodies in the baby."

Dogs can detect COVID-19 infections faster and more accurately than conventional technology, a review shows.

An epidemiologist explains what you should know for respiratory virus season after last year's "tripledemic" of flu, COVID, and RSV.

The risk of negative effects of both mRNA COVID vaccines is very low, but older adults fare better with the Moderna vaccine, researchers find.

A new breath test quickly identifies people infected with COVID. It provides results in less than a minute.

Newly-discovered, exceptionally potent antibodies can neutralize virtually all known variants of the COVID-19 virus—including Omicron.

COVID vaccines are not likely to blame for any major changes to the menstrual cycle, a new study shows.