Bird flu strains spread globally, affecting animals and humans

Avian influenza, or bird flu, is spreading globally, with a severe H5N1 variant affecting animals since 2020. In the United States, dairy cows are infected, with four workers testing positive. Different strains have been found in Australia, Mexico, and other countries. Human cases are linked to exposure to poultry. The World Health Organization states the current risk to people is low. Germany reported a rare H7N5 outbreak.