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.

There is still a danger, however: a person in Louisiana recently became the first person in the country to die from H5N1. Louisiana health officials said the patient was over the age of 65 and had underlying medical conditions. They contracted bird flu after exposure to a personal backyard flock and also wild birds.