The prevention and control of the epidemic in Wuhan continued to take strict measures, with some positive changes in the epidemic situation. However, there are still hundreds of newly confirmed cases every day in Wuhan recently. Where do these newly confirmed cases come from? Reporters from “Xinhua perspective” followed up.
It is understood that novel coronavirus pneumonia related groups are mainly investigated and managed in Wuhan, including suspected cases, close contacts, etc. So, which group is the main source of newly confirmed cases?
First, the suspected population is the main source of newly confirmed cases. Liang Wannian, head of novel coronavirus pneumonia coping group, recently introduced 80% to 90% of the newly confirmed cases in Wuhan, which is suspected of being transferred, the national health and Health Committee said recently.
Taking February 28 as an example, 420 new confirmed cases were found in Wuhan, among which 336 to 378 were transferred from suspected cases. According to the novel coronavirus pneumonia control command of Wuhan, 788 suspected cases were suspected in Wuhan in February 28th, and 114 suspected cases were added on that day.
According to a person from the disease control department in a main urban area of Wuhan, 83% of the new cases in the area turned over from suspected cases on February 29.
Secondly, some of the close contacts were transformed into newly confirmed cases. China World Health Organization Joint Expert Group tracking survey found that about 1% – 5% of close contacts were confirmed to be infected with the new coronavirus. Taking February 28 as an example, there are 13728 close contacts in Wuhan. According to the above proportion, the number of people who may be infected with the virus is between 137 and 686.
Novel coronavirus pneumonia is still relatively high in some isolated areas, according to a survey. According to a disease control official in a major urban area of Wuhan, the proportion of people who are closely connected to the area who have been diagnosed is about 6%.
The reporter got the statistical data of two isolation points in a main urban area, which showed that the first isolation point had 170 visitors, 26 of whom had been transferred out, accounting for 15%; the second isolation point had 270 visitors, 27 of whom had been transferred out, accounting for 10%.
According to the analysis of the managers of the close contact isolation points in a main urban area of Wuhan, recently, due to the expansion of the detection scope of nucleic acid to the close contact population, some asymptomatic infections that had not been found before were also detected, so the number of confirmed cases increased significantly. In the statistical table of this area, the first isolation point has a total of 22 positive transferred nucleic acids, and the second isolation point is 16. Managers say many of these are asymptomatic infections.
In addition, a number of Wuhan disease control personnel said that a considerable part of the new cases in recent days were asymptomatic infections found in special places such as detention centers. According to the data, as of 24:00 on February 29, 233 people in the special field were newly added 565 on that day.
In February 11th, the novel coronavirus pneumonia control command of Wuhan released the No. twelfth circular. In order to further strengthen the source control and minimize the flow of personnel, it was decided that all residential areas in the city should be closed up from now on. For novel coronavirus pneumonia patients or suspected patients, the building units must be strictly managed.
The novel coronavirus pneumonia incubation period is 1-14 days, mostly 3-7 days, according to the sixth edition of the treatment plan.
Reporters found that individual community epidemic announcements showed that in recent days, there have been new confirmed cases. On February 28, a community in Wuchang District reported that one new confirmed case was found in four communities of the community on that day; on February 28, a community in Qingshan District reported that one new confirmed case was found on that day. In addition, novel coronavirus pneumonia was diagnosed in February 28th in a unit of Hongshan District, a unit of workers living in a community in Jiangxia district.
According to the epidemic announcement of a community in Hongshan District on February 28, from February 24 to 12:00 on February 28, four of the seven grids announced had no new confirmed cases for five consecutive days, and the other three grids had new confirmed cases within five days.
According to the notice, no new confirmed cases were found in the second grid for 4 consecutive days, no new cases in the seventh grid for 1 day and no new cases in the eighth grid for 2 consecutive days. That is to say, the three grids are between 24 and 28 days, with new cases.
In addition, some communities have also announced new suspected cases. On February 28, a community in Dongxihu District reported that there were 0 newly confirmed cases and 1 newly suspected case on that day; on February 28, a community in Qingshan District reported that there was 1 newly suspected case.