what can cause avian flu? #birds #influenza

Bird flu outbreak in US, and what are the symptoms of H5N1 avian influenza

Recognizing the Symptoms of Avian Influenza in Chickens | Dr.Vet

Bird Flu in Humans: Transmission, Symptoms and Treatment of Avian Influenza (H5N1) | UC Davis Health

Bird Flu(Avian Influenza), Causes, Signs and Symptoms, Diagnosis and Treatment.

Mayo Clinic virologist explains concern about avian flu and why flu vaccine is important