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 US CDC is on high alert as 46 human cases of H5 bird flu are reported, with outbreaks in wild birds, poultry, and even ...

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 ...

If you still haven't gotten your COVID or flu shot​, now is the time so you'll stay protected throughout the season, ...

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

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

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

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