Coronavirus consists of a double lipid envelope, including spike protein, envelope protein, membrane protein and nucleocapsid protein. Among them, S protein and N protein are the most important target proteins. S protein is located in the outermost layer of the virus and is related to the infectivity of the virus. It undertakes the function of binding and membrane fusion between the virus and the host cell membrane receptor, is an important site for neutralizing antibodies in the host, and is also a key target for vaccine design.
COVID-19 is a coronavirus, belonging to β genus of virus family. It can cause infectious diseases and is called novel coronavirus. It was first discovered in Wuhan, Hubei Province, China. The virus is enveloped, round or oval in shape, with a diameter of about 60- 140 nm, and has a variety of surface proteins, which can combine with the receptor of the host cell and enter the cell for replication. After infection, patients may have respiratory symptoms, fever, cough, fatigue, shortness of breath and other symptoms, which may lead to death in severe cases.
What is the route of transmission in COVID-19?
Transmission routes in COVID-19 mainly include respiratory droplet transmission, contact transmission and aerosol transmission.
1, respiratory droplet transmission: mainly refers to the droplets exhaled by infected people, which lead to infection through close inhalation.
2. Contact transmission: mainly refers to the sputum or droplets floating on the surface of the object when the infected person coughs, and the healthy person touches the surface of the contaminated object, causing infection.
3. Aerosol transmission: mainly refers to the combination of droplets and dust in the air, floating in the air and causing infection through inhalation.
What preventive measures does COVID-19 have?
1, keep indoor sanitation, and regularly open windows for ventilation.
2. Wear a mask when going out to avoid going to crowded places.
3, wash your hands frequently, you can wash your hands with hand sanitizer or alcoholic soap.
4. Avoid contact with any patients or suspected patients.
5, novel coronavirus vaccine, make the body produce novel coronavirus antibody, thus reducing the risk of novel coronavirus infection.