Health officials in Louisiana say a person there has died after catching bird flu. This marks the first reported death in the ...

For influenza viruses, imperfection is a strength. They constantly mutate, producing new strains that challenge immune ...

The US just recorded the first death from severe bird flu. Experts say it's not too early, or unreasonable, to prepare for ...

A person in Louisiana who was hospitalized with a severe case of bird flu has died.

Doctors say the case of a teen left in critical condition shows H5N1 "can cause severe human illness." Mutations in the virus are deepening concerns about the spread of H5N1.

In light of the ongoing global spread of the H5N1 avian influenza, U.S. public health experts are reassured that current ...

Most human cases of bird flu in North America have been mild, a fact that’s underscored by a new study of the first 46 ...

So far, the H5N1 virus isn't transmitted between people — but the CDC has found a mutation in a human case "concerning." ...

The CDC has revealed the red flags it is monitoring for that suggest that bird flu was about to become the world's next pandemic.

The Centers for Disease Control and Prevention (CDC) has identified mutations in the H5N1 bird flu virus that may increase ...

The bird flu virus found in a severely ill patient hospitalized in the United States has mutated to become better adapted to ...

When, where and how the H5N1 bird flu virus may evolve and its capacity to spark a pandemic is hard to predict — in part, ...