New SARS-CoV-2 variants detected in wastewater sewers in New York City could help identify where the next variant will come from, researchers say.

Bird flu has shown up again in the United States, but what exactly is it and should you worry? An expert explains what's important to know.

A new survey shows young moms worried more about money than avoiding COVID-19 and were more hesitant about having their kids get the vaccine.

A new COVID test combines the speed of over-the-counter antigen tests with the accuracy of PCR tests that are processed in medical labs and hospitals.

An influenza vaccine taken up the nose yields strong protection against different flu virus strains, a new study with mice shows.

Even when people self-isolate in a room at home, the virus that causes COVID-19 makes it into other rooms, researchers report.

Pigs can get infected with SARS-CoV-2, but the infection is limited, they don't show symptoms, and they can't spread it. New research finds a clue to why.

Two-thirds of infant deaths from Respiratory Syncytial Virus (RSV) occurred in the community and would have been excluded from mortality estimates based on hospital data.

A new rapid test that can detect all known COVID-19 variants, including Omicron, could guide treatment and identify high-risk patients, researchers say.

The surfaces in hospital rooms where COVID-19 patients got care don't have enough living COVID-19 virus on them to spread the infection, research finds.