Shares of vaccine makers including Moderna, Novavax and CureVac rose Tuesday after U.S. health officials confirmed the first American death caused by the H5N1 bird flu. Moderna and Novavax shares rose more than 10%,

The U.S. will rebuild its stockpile of bird flu vaccines for poultry matched to the current strain of the virus circulating among commercial flocks and wild birds, the Department of Agriculture said on Wednesday.

A 13-year-old girl in Canada became so sick with H5N1, or bird flu, in late 2024 that she had to be put on a ventilator. Around the same time, a senior in Louisiana was diagnosed with the first "severe" case in the U.S.

The United States has reported its first human death from H5N1 bird flu, marking a somber moment in the ongoing outbreak of the virus. The Louisiana Department of Health announced in a statement on Monday that a patient over the age of 65,

The U.S. has developed a bird flu vaccine that can be prepared when needed. It’s not currently available because health officials haven’t deemed it necessary.