In what year did the epidemic occur?

The epidemic occurred on 20 19. The first case in Wuhan was 2019 65438+February 8, 2020, Wuhan1October 23, March 18, and April 8. The diagnosis was 504 19, and the death was 3869. The resident population of Wuhan is13.64 million. The city was closed for 76 days, accounting for 3.7‰ of the urban population. The mortality rate was 7.6%.

Detailed description of epidemic situation

Novel coronavirus, a coronavirus belonging to β genus, has not been found in humans before, and is also called 20 19 novel coronavirus 20 19-nCoV, which can cause novel coronavirus after infection.

Coronavirus is a kind of linear single-stranded RNA virus, which is named after its envelope has protrusions protruding around like corollas. It is sensitive to heat and ultraviolet rays. Novel coronavirus is a β -coronavirus with round or oval particles with a diameter of 60 ~ 140 nm, which can cause variation during replication.