Virus flu

Viral influenza is a common disease of people, including common cold, influenza, and viral pharyngitis. It is mainly transmitted through the nasal cavity through air or hand contact. Influenza is an acute respiratory infectious disease caused by the influenza virus. The virus exists in the respiratory tract of a patient and is transmitted by droplets when the patient coughs or sneezes. Because it is highly contagious, the transmission route is not easy to control, the transmission speed is fast, and the transmission range is wide, it is difficult to control, the harm is very large, and even severe cases (severe pneumonia, respiratory failure, etc.) will occur. Common colds are caused by rhinoviruses, coronaviruses, and parainfluenza viruses. Common colds are much less contagious than influenza, and they often appear individually. When the body's resistance decreases, it is easy to get sick.