Wuhan pneumonia is caused by a new coronavirus pneumonia, which is a brand new virus that has not been found in humans or animals, most likely originating from bats, but may have undergone some mutation midway through transmission to humans. Therefore, the human body is not resistant to the new mutated virus, and all people can be infected and belong to the susceptible population. A survey of diagnosed patients found that the largest number of people were in the 50-60 age group, which may be related to the range of activity. If this age group may be more likely to go out and more likely to go to crowded places, such as farmers’ markets, seafood markets, etc., so the incidence is highest in this age group. Hedgehog, the epidemic concentrated in January, January has not yet been officially holiday, probably 50-60 years old age group people go out more, then the holidays and the beginning of the Spring Festival, more students also appear infected people. However, overall, the majority of patients are now counted to be in the age group of 50-60 years old. Content source: Dr. You Lai