Avian Flu 2025 Symptoms. Avian influenza, commonly called “bird flu,” is a viral infection that usually spreads in birds but can sometimes spread to humans. In people, signs and symptoms of bird flu can include fever, cough, sore throat, muscle aches, pneumonia, shortness of breath,.
This is in line with world. This is the first human infection caused by avian influenza a (h5n1) virus in 2025 in the united states and the second confirmed detection in human in the country.