"The patients are sick not because of the virus," says Jean-Laurent Casanova. "They're sick because they excessively respond to the virus."

A new diagnostic test is 10X better than state-of-the-art tests used during the COVID pandemic, researchers say.

Researchers have created an inhalable powder that could protect the lungs and airways from invading viruses.

Extracts from the flowers of two common wild plants block the virus that causes COVID from entering human cells.

Nursing home staff who worked the night shift had lower rates of COVID-19 testing and vaccination than day-shift staff, researchers report.

Tigers in Nepal were two to three times more likely to cross highways when COVID-19 lockdowns led to dramatic reductions in traffic.

Out of the 47 top-reported "long-COVID" symptoms, researchers were surprised to find only seven that were directly related to the virus.

Fewer children had MIS-C during the Omicron wave of the pandemic than the Delta wave and cases were also milder, a new study shows.

Many homebound older adults canceled medically necessary home-based health care services out of fear of getting COVID-19, research finds.

Even those without a PTSD diagnosis, many frontline health workers experience symptoms that could lead to other problems.