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

"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.

Lab testing provides doctors with essential information to help them diagnose and treat disease. Here’s what happens behind the scenes after you roll up your sleeve for a blood draw.

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

Some coughs can last for weeks or even months following an upper respiratory infection. The good news – albeit not very satisfying – is that most eventually go away on their own.

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.

President Joe Biden’s intention to end the national COVID-19 emergency will have long-lasting ripple effects on federal programs such as Medicare, Medicaid and the Children’s Health Insurance Program.