The epidemic situation in Wuhan began on 20 19 12.27. Reviewing the epidemic situation can be divided into several stages: the first stage: immediately responding to the sudden epidemic situation in Wuhan, Hubei Province (20 19 12.27 to 2020 19).

The second stage: initially contain the spread of the epidemic (65438+120 October to 20 February). The number of newly confirmed cases in China has increased rapidly. China has taken the key measures to block the spread of the virus, resolutely closed the Han-Hubei channel, and the Wuhan-Hubei defense war has started in an all-round way.

In the third stage, the Wuhan-Hubei Defence War achieved decisive results (March 18 to April 28). The spread of local epidemic situation in Wuhan has been basically blocked, and the control measures of the Han-to-Hubei channel have been lifted to eliminate COVID-19 patients in Wuhan.

Novel coronavirus pneumonia

Novel coronavirus, abbreviated as "COVID-19", was named "20 19 coronavirus disease" by the World Health Organization, which refers to pneumonia caused by novel coronavirus infection in 20 19. Since 20 19 and 12, many cases of unexplained pneumonia with a history of exposure to the seafood market in South China have been found in some hospitals in Wuhan, Hubei Province, and were diagnosed as acute respiratory infectious diseases caused by novel coronavirus infection in 20 19.

According to the existing case data, novel coronavirus is mainly characterized by fever, dry cough and fatigue, and a few patients are accompanied by symptoms of upper respiratory tract and digestive tract such as nasal congestion, runny nose and diarrhea. Most severe cases have dyspnea after 1 week, and severe cases rapidly progress to acute respiratory distress syndrome, septic shock, metabolic acidosis that is difficult to correct, bleeding and coagulation dysfunction and multiple organ failure.

The above content is referenced from Baidu Encyclopedia-novel coronavirus.