The H7 virus of influenza A is usually a group of influenza viruses transmitted in birds. Influenza A virus (h7n9) belongs to a subgroup of H7 virus. Although some H7 viruses (H7N2, H7N3, H7N7) have occasionally been reported to infect humans, no human infection with h7n9 has been reported in the past, until recently, human infections have been reported.

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avian influenza viruses are generally sensitive to heat and have strong resistance to low temperature. They can be inactivated by heating at 65 ℃ for 30 minutes or boiling at 100 ℃ for more than 2 minutes. The virus can survive for 1 week in low temperature feces and 1 month in water at 4 ℃.

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3. Transmission route

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can not only be transmitted through respiratory tract, but also be infected by close contact with infected poultry secretions or excreta, or by direct contact with virus.

4. Prevention and control measures

although the source and transmission mode of infection are still uncertain, the following measures are effective measures to prevent infection:

1. Do not contact and eat sick (dead) poultry and livestock meat, and do not purchase fresh, live, frozen livestock and their products without quarantine certificate.

2. Raw poultry, meat and eggs must be cooked thoroughly.

3. In the process of food processing and eating, it is necessary to separate raw and cooked food, avoid cross contamination, and do not use chopping boards, knives and containers to deal with raw poultry and livestock meat;

4. Keep good personal hygiene habits and do not drink raw water. Keep hands clean and wash hands frequently. Wash hands before, during and after food preparation, before and after meals, after handling raw meat and eggs.

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