Health officials were struggling to answer a broader and potentially worrisome question: how the infection occurred.

The new guidance comes after blood tests for 115 farmworkers in Michigan and Colorado showed that eight workers — or 7% — had ...

Researchers have identified new roles for a protein long known to protect against severe flu infection—among them, raising ...

Wastewater in several Californian cities, including San Francisco and Los Angeles, recently tested positive for bird flu. But ...

Here’s our weekly round-up of what illnesses are spreading the most in Metro Detroit communities, according to our local ...

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

A Canadian teenager infected with bird flu — that country’s first case involving a locally acquired infection — is in ...

Updated vaccines, proper hygiene and staying home when you're sick can help prevent the spread of respiratory illnesses this ...

A Canadian teen who is in critical condition after contracting H5N1 bird flu was infected with a version of the virus that is different from the one circulating in U.S. cattle.

A Canadian teenager is currently in critical condition after contracting a suspected case of H5N1 bird flu, a British ...