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Cause and Risk Factors
Bird flu is caused by infection with one of the avian influenza viruses. People who handle or have other contact with infected birds (e.g., farm workers) are at increased risk for developing the disease. People who live in or travel to affected areas of the world (e.g., Asia, and parts of Africa and Europe), health care providers in these areas, and household members of infected patients are also at increased risk.

Signs and Symptoms
The period of time between exposur...Read the full article