Quick card for poultry workers on symptoms in birds and humans as well as the need for eradication activities Avian Flu Poultry Employees Avian flu is a viral disease and it can be very contagious and even deadly in poultry (e.g., chickens). Of great concern are the highly pathogenic avian influenza (HPAI) H5N1 viruses that have killed millions of birds and have infected humans in other countries. If these viruses are found in the U.S., take appropriate precautions if you are involved in poultry destruction. Signs of Avian Flu Illness in Birds Sudden death, lack of energy, appetite, and coordination, purple discoloration and/or...