Health officials in the United States are warning people to be careful about bird flu. The virus is called H5N1. There are fewer new human cases now, but experts are still worried. The last confirmed human infections were in February 2025. Most people who got sick worked on dairy and poultry farms. California had 38 human cases, but no new ones after January 14. One person did not survive, and most people had mild symptoms.

Some health experts say bird flu cases go down in winter because of bird migration. But others think not enough people are being tested. Some farmworkers may be afraid to get help because of immigration rules. Also, there are fewer workers now in U.S. health departments, and this may cause fewer tests. Scientists at Texas A&M University and the University of Maryland are doing studies to find out more. They are testing dairy workers and cats. Over 120 cats in the U.S. have been infected, and some did not survive. Experts say more testing is needed. They worry that the virus might spread again. Watching it closely now can help stop a bigger problem later.