China CDC Report: Over 3,000 doctors and nurses infected with coronavirus

2020-02-17

New Beijing News (Reporter Xu Wen) The results of an epidemiological survey based on more than 70,000 new cases of coronary pneumonia (COVID-19) were announced on February 17. The latest issue of the Chinese Journal of Epidemiology published the report “Analysis of Epidemiological Features of New Coronavirus Pneumonia”, which was written by the Epidemiology Group of the New Coronavirus Pneumonia Emergency Response Mechanism of the Chinese Center for Disease Control and Prevention.

The report analyzed a total of 72,314 cases, which covers all new cases of coronavirus pneumonia reported in the Infectious Disease Reporting Information System in Mainland China as of February 11, 2020. Of the 44,672 confirmed cases, 1023 died and the fatality rate was 2.3%.

The report also shows that as of February 11, a total of 3019 medical staff were infected with the new coronavirus (including confirmed cases, suspected cases, clinically diagnosed cases, and asymptomatic infections, of which 1,716 confirmed cases).

The report states that till now there is no evidence that a “super communicator” incident has occurred in any of the medical institutions serving patients with new coronavirus pneumonia.

New coronary virus (COVID-19) is more contagious than SARS

The report mentioned that in late December 2019, an unexplained mass of pneumonia cases occurred in Wuhan, China, which caused the concern of the health authorities. On December 31, the Chinese Center for Disease Control and Prevention sent a rapid response team to Wuhan. Also, potential causes including influenza, avian influenza, adenovirus, severe acute respiratory syndrome coronavirus (SARS-CoV), and Middle East respiratory syndrome coronavirus (MERS-CoV), were also eliminated.

The epidemiological investigation pointed out that the case infection might be related to Wuhan South China Seafood Market. On January 1, the local government closed the South China Seafood Market and disinfected the market. At the same time, active search and emergency monitoring of cases were conducted. On January 3, the Chinese government notified the WHO of the epidemic.

Early cases suggest that the coronavirus may not be as severe as SARS-CoV and MERS-CoV. However, the rapidly increasing number of cases and increasing evidence of human-to-human transmission suggest that the virus is more contagious than SARS-CoV and MERS-CoV, respectively.

The report believes that although COVID-19 is highly contagious, most patients show mild symptoms, and the overall crude case fatality rate remained low. The majority of deaths are patients of 60 years of age and older, who suffer from underlying diseases such as hypertension, cardiovascular disease and diabetes.

This study describes the epidemic curve of COVID-19 for the first time. The report points out that the overall curve shows an outbreak pattern, and cases that occurred in December 2019 may represent a small-scale exposure transmission mode. During the January 2020, it may be a spread transmission mode. The time trend of this outbreak is consistent with the previous survey conclusion that the South China seafood market in Wuhan may have wild animal trading, allowing the new coronavirus to spread from still unknown wildlife to humans, and then spread from person to person.

Hubei Province’s fatality rate is 7.3 times higher than other provinces

The report shows that as of February 11, 72,314 cases were reported. Among them, 44 672 confirmed cases (61.8%), 16186 suspected cases (22.4%), 10567 clinically diagnosed cases (14.6%), and 889 asymptomatic infections (1.2%).

Of the 44,672 confirmed cases, most were between the ages of 30 and 69 (77.8%), and 80.9% were mild/moderate.

There were a total of 1023 deaths, with a crude case fatality rate of 2.3% and a case fatality rate of 0.015 / 10 person-days. That is, the average risk of death for each patient observed for 10 days was 0.015. The crude case fatality rate in the age group ≥80 years was 14.8%. The crude case fatality rate was 2.8% for men and 1.7% for women. The crude case fatality rate (2.9%) in Hubei Province was 7.3 times higher than in other provinces (0.4%).

The crude case fatality rate for patients with no comorbidities is approximately 0.9%, and the case fatality rate is much higher for patients with comorbidities, 10.5% for cardiovascular disease patients, 7.3% for diabetes, 6.3% for chronic respiratory disease, and 6.0%, cancer was 5.6%.

Severe cases accounted for 13.8%, and critical cases accounted for 4.7%. The crude case fatality rate of critical cases was 49%, and the case fatality rate was 0.325, which means that the average risk of death for every 10 days observed in each case was 0.325.

Guangdong reports first confirmed case outside Hubei

The report shows that on January 19, the National Health and Health Commission confirmed the first confirmed case of pneumonia imported from Guangdong Province with a new type of coronavirus infection. This is the first confirmed case of new coronary pneumonia reported in a province other than Hubei in China.

As of January 22, 301 confirmed cases of new coronary pneumonia have been reported in 83 counties and districts in 23 provinces across the country. On January 30, Tibet reported the first confirmed case of new crown pneumonia imported from Hubei province. So far, 30 provinces except Hubei have reported the outbreak of new crown pneumonia within two weeks.

The report retrospectively analyzed the onset dates of the reported cases and restored the changes in the geographic distribution of confirmed cases of new coronary pneumonia in the country at five different periods.

The report restores the national geographic distribution of confirmed cases of new coronary pneumonia in five different periods. 

As of February 11, a total of 44,672 confirmed cases (74.7% in Hubei) were reported in 1386 counties and districts in 31 provinces across the country. Among them, 0.2% of the cases occurred on or before December 31, 2019, and the cases were all in Hubei; 1.7% of cases occurred on or before January 10, and were distributed in 113 counties in 20 provinces, of which It accounts for 88.5%; 13.8% of the cases have an onset date before January 20, and are distributed in 627 counties and districts in 30 provinces, of which Hubei accounts for 77.6%; 73.1% of the cases have an onset date before January 31 In 1310 counties and districts in 31 provinces, Hubei accounted for 74.7%.

3019 medical staff infected with the coronary virus (COVID-19)

The report pointed out that the peak period of medical staff cases may occur on January 28.

Among the 422 medical institutions providing diagnosis and treatment services for patients with new coronary pneumonia, a total of 3019 medical staff were infected with the new coronavirus (including confirmed cases, suspected cases, clinically diagnosed cases and asymptomatic infections, of which 1,716 confirmed cases), of which Five people died. There may be infections from non-occupational exposures.

An analysis of 1688 confirmed cases with severe disease was performed in Wuhan, accounting for 1080 cases, accounting for 64.0% of the total number of medical personnel in the country, Hubei except for Wuhan, 394 cases (accounting for 23.3%), and 30 provinces other than Hubei (District / city) 214 cases (12.7%).

The severe illness rate of medical staff was 17.7% in Wuhan, Hubei (except Wuhan) was 10.4%, and the country (except Hubei) was 7.0%. According to different time periods, the severe illness rate of Wuhan medical staff gradually decreased from 38.9% at its peak to 12.7% in early February.

From December 8, 2019 to February 11, 2020, medical personnel across the country, Hubei, and Wuhan reported the confirmed cases, severe cases, and deaths of new crown pneumonia of medical staff. Figure

This study described for the first time 1688 cases confirmed by medical staff, most of which were mild patients (85.4%), and the mortality was lower than other cases. The main reason is related to age. Medical staff are all working staff, generally under 60 years old, and deaths mainly occur in patients over 60 years old.

The report mentions that, as of now, there is no evidence that a “super communicator” incident has occurred in any of the medical institutions serving patients with the new coronavirus pneumonia.

The report reminds that serious medical staff infections have occurred in some areas of Wuhan and Hubei, but the specific causes of medical staff infections and protection failures have yet to be investigated further.

Translated from New Beijing News

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