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

In hospitalized patients, eosinophil levels positively correlated with antibiotic use, systemic inflammation, and worsened ...

Researchers have identified new roles for a protein long known to protect against severe flu infection -- among them, raising the minimum number of viral particles needed to cause sickness.

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 ...

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

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

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

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.

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

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