The US Department of Health and Human Services awarded Moderna $590 million to continue developing a vaccine to protect against bird flu.

While drugmakers are hard at work on the shots, they’re not yet ready to blunt the impact of a potential pandemic.

The team found that animals that had the virus inoculated directly into their lungs became severely ill, whereas animals that ...

In recent months, bird flu has started raising red flags among scientists and public health officials. Apoorva Mandavilli, a New York Times reporter who covers infectious diseases, explains why we ...