【Photo】Eight aspects to deepen understanding of influenza

【Photo】Eight aspects to deepen understanding of influenza

Influenza is an acute respiratory infectious disease caused by influenza virus, which seriously endangers people's health. The influenza virus has variable antigenicity and spreads rapidly, causing seasonal epidemics every year. Outbreaks are prone to occur in places where people gather, such as schools, childcare institutions and nursing homes. Seasonal influenza epidemics can cause 3 million to 5 million severe cases and 290,000 to 650,000 respiratory disease-related deaths worldwide each year.