H5N1 vaccines have been previously licensed, and millions are in the national stockpile. But even with the news of the country’s first human death due to bird flu, vaccination isn’t yet recommended.

Bird flu has been making the rounds in the United States over the last year and appears to be resurging again. Here’s what you need to know.

The United States and Canada have lifted embargoes on certain French poultry imports imposed after Paris decided to vaccinate ducks against bird flu in October 2023, the French agriculture ministry said on Monday.

Moderna has been testing an mRNA candidate for influenza viruses like the H5 and H7 strains that are seen as pandemic threats. Others, including GSK and Pfizer, are also at work on similar shots.

"The Chinese poultry lineage may have experienced more vaccine-driven selection compared to other lineages," the researchers wrote.