- Avian influenza (A1) commonly known as bird flu is an infectious viral disease of birds.
- Most bird flu viruses do not infect humans but some strains such as A(H5N1) and A (H7N9) have caused serious infections in people.
- The primary risk factor for human infection appears to be direct or indirect exposure to infected live or dead poultry or contaminated environments, such as live bird markets.
- There is no evidence that the disease can spread to people through properly cooked food.
- Controlling the disease in animals is the first step to reducing risk to people.
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