The first human death caused by H5N1 in the U.S. was reported in Louisiana on Jan. 6. Here's what to know about bird flu.

With reports of the first human death from bird flu in the US, some Americans are feeling an uncomfortable flashback to the early days of Covid-19, when infectious disease experts were talking about a new virus that was sending people to the hospital with respiratory infections.

One of the earliest strains of bird flu isolated from a human in Texas shows a unique constellation of mutations that enable it to more easily replicate in human cells and cause more severe disease in mice compared to a strain found in dairy cattle,

The announcement comes one week after officials announced that H5N1 had been detected in a backyard flock in Oakland County and that 12 people who'd had contact with the infected

How deadly is the bird flu? The US has reported its first death from avian influenza, H5N1. Here's what to know about bird flu mortality rate and who is at risk.

Bird flu continues to affect animal species everywhere, including a Chilean flamingo and a harbor seal at Lincoln Park Zoo in Chicago. Both animals died of the avian flu last week, and many staffers and volunteers were devastated to have lost them.