Influenza virus has weak resistance and heat resistance, and can be inactivated at 56℃ for 30 minutes. The infectivity is quickly lost at normal temperature, but it can survive for several weeks at 0℃ ~ 4℃ and for a long time below -70℃ or after freeze-drying. The virus is also sensitive to dryness, sunlight, ultraviolet rays and chemicals such as ether, formaldehyde and lactic acid.

The source of infection of influenza virus is mainly patients, followed by recessive infection, and infected animals may also be the source of infection. The main route of transmission is droplets with influenza virus, which enter the body through the respiratory tract. A few people can also be infected through indirect contact with handkerchiefs and towels.

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How to prevent the flu

1, "one shot" refers to the annual injection of influenza vaccine. The biggest feature of influenza virus is its easy mutation. The flu vaccine needs to be vaccinated every year. After vaccination, the protective effect on human body can reach more than 70%, which can effectively curb the spread of influenza.

2. "Two-way" means to keep indoor air circulation and avoid going to places with poor ventilation and many people;

3, "three enhancements" is to pay attention to a balanced diet, drink more water, exercise regularly, have enough rest, and enhance the body's resistance;

4, "four clean-ups" means cleaning the face, nose and mouth, keeping it clean and reducing the chance of infection;

5. "Five precautions", that is, during the influenza epidemic season, you should avoid going to crowded public places, wear masks when necessary, and change them regularly;

6, "six hand washing", hand washing is a very important way to prevent virus infection.

Baidu Encyclopedia-Influenza Virus

People's Daily Online-The sudden drop in temperature teaches you how to get through the flu.