Epidemic definition
The new type of coronavirus pneumonia is an acute infectious pneumonia, and its pathogen is a new type of coronavirus that has not been previously found in humans, that is, the 2019 new type of coronavirus. On February 7, 2020, the National Health Commission decided to "new coronavirus on February 11, the World Health Organization (WHO) will call its English name Corona Virus Disease 2019 (COVID-19). On February 22, the country The Health Commission decided to revise the English name of "new coronavirus pneumonia" to "COVID-19", which is consistent with the name of the World Health Organization, and the Chinese name remains unchanged.
On January 30, 2020, the WHO announced that the new coronavirus pneumonia epidemic was listed as a public health emergency of international concern
The initial symptoms of patients are mostly fever, fatigue, and dry cough, and severe symptoms such as dyspnea gradually appear. Most patients have a good prognosis, and some severe cases may develop acute respiratory distress syndrome or septic shock, or even die. At present, there is a lack of effective antiviral drugs against pathogens, and isolation treatment and symptomatic support treatment are the main ones.
Epidemiology
Based on the current epidemiological investigation, the incubation period is 1-14 days, mostly 3-7 days. The incubation period is infectious, and asymptomatic infections may also become the source of infection, and the population is generally susceptible.
Based on the current epidemiological investigation, the incubation period is 1-14 days, mostly 3-7 days. The incubation period is infectious, and asymptomatic infections may also become the source of infection, and the population is generally susceptible.
Spread through respiratory droplets and close contact is the main route of transmission. Since the new coronavirus can be isolated in feces and urine, attention should be paid to the environmental pollution caused by feces and urine to cause aerosol or contact transmission. Prolonged exposure to high-concentration aerosols in a relatively closed environment may be spread by aerosols. There may be a risk of aerosol transmission in closed and unventilated places, and prevention and isolation must be strengthened.
In December 2019, multiple cases of "unexplained pneumonia" were found in Wuhan, Hubei Province, and most of the subsequent patients had a history of exposure to the South China Seafood Market or family gatherings;
At 21:00 on January 7, 2020, researchers detected a new type of coronavirus in patient specimens;
At 24:00 on January 10, the pathogenic nucleic acid test was completed;
On January 12, the World Health Organization (WHO) temporarily named the new coronavirus that caused the Wuhan pneumonia epidemic as 2019 new coronavirus (2019-nCoV);
On January 30, the WHO announced that the new coronavirus epidemic was listed as a public health emergency of international concern.
On February 7, the National Health Commission decided to temporarily name the "new coronavirus-infected pneumonia" as "new coronavirus pneumonia", or "new coronary pneumonia" for short. The English name is "Novel Coronavirus Pneumonia", referred to as "NCP";
On February 11, the WHO named the disease caused by the new type of coronavirus as COVID-19, the English name is "Corona Virus Disease 2019", or "COVID-19" for short;
