Bird flu H5N1 has infected dozens of people in the U.S. this year. Could it be the next pandemic? Experts explain the threat ...

There have been dozens of confirmed human cases of bird flu in the U.S. this year. Experts discuss the symptoms, risks and ...

With 46 U.S. cases and alarming signs of the virus crossing species, experts warn of unpredictable risks if human-to-human ...

The Madera County Department of Public Health working with state and federal health agencies has identified two human cases of H5N1 bird flu.One of the cases h ...

As we head into cold and flu season, pneumonia and whopping cough are spreading in Massachusetts, particularly among ...

A teenager in Canada is critically ill with the country's first human case of H5N1 bird flu. Health officials aren't sure how ...

Initial testing had indicated the teenager's infection was from bird flu and was confirmed in further testing, the Public ...

Cases of H5N1 bird flu in U.S. dairy and poultry workers have largely been mild. However, a new case in a British Columbia ...

A teenager in British Columbia was hospitalized in critical condition with the disease, and officials were working to find ...

Pertussis, also known as whooping cough, is a "highly contagious acute respiratory illness" that starts with mild symptoms, Goldstein said. Infected individuals later develop a severe cough that can ...

Another cause for concern: flu season is underway in the U.S., and as seasonal influenza virus goes around, “humans, ...

Viruses are the fastest-evolving biological entity on Earth. This fact explains why we need flu shots every year: Seasonal ...