Despite knowing the risks of COVID-19, breakthrough infections, and long COVID, US adults are less and less likely to take precautions, a survey finds.

The paper test measures the level of neutralizing antibodies in a blood sample and could help people decide what protections they should take against infection.

Children's noses are better at inhibiting SARS-CoV-2 infections than adult noses. But it's a different story when the Omicron variant is involved.

A new COVID-19 test detects and identifies specific SARS-CoV-2 variants with 100% accuracy, researchers say.

While a strong immune response is essential to fight against viral infection, an immune system that continues to stay active long after the virus has been cleared can lead to lung damage.

New research is "a step forward in understanding viral infection pathways and paves the way for research toward better treatments in the future."

New research ties inaccuracies in pulse oximeter readings to racial disparities in treatment and outcomes.

A new patch "has the potential to offer a new—and more effective—weapon in our arsenal, at a time where new variants are mutating at a rapid rate."

Amid a steady rise in monkeypox cases worldwide, an expert explains how the virus is transmitted, who is at risk, and how vaccines can control the spread.

Researchers say two new studies virtually eliminate alternative scenarios that have been suggested as origins of the pandemic.