Avian influenza is a type of influenza A virus which is mainly found in wild birds. Avian influenza can also infect domestic poultry, such as chickens and turkeys, and less commonly, mammals. Human infections with avian influenza are rare. If people do become infected, it is usually because they have had close contact with infected poultry or their environment. Symptoms can include fever, body aches, cough, sore throat, red eyes, breathing problems and sometimes, diarrhea and vomiting. Avian influenza does not spread easily from person to person.