Where do hundreds of newly confirmed cases come from in Wuhan?

 Where do hundreds of newly confirmed cases come from in Wuhan?

80% - 90% of the cases are suspected cases, and the proportion of confirmed cases in the population closely connected to some isolation points is higher than 5%

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.

Some districts still have sporadic confirmed cases

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.

It is difficult to seal and control the old community, so the floating personnel need to strengthen protection

Xu De, the leader of the first group of disease control teams supporting Wuhan in Anhui Province, said that it was not only expected, but also within the scope of control, for the close contact personnel to convert the disease and suspected cases into confirmed cases. However, he reminded that the prevention and control measures for some communities have not been strictly implemented.

The reporter visited a community in Hongshan District recently with newly confirmed cases, and found that the pressure of sealing and controlling was high. According to the staff on duty, there are more than 8000 people in the community, and now there are 4500 people in and out every day. From 1:00 p.m. to 1:40 p.m., 46 people went in and out of the register, one minute on average. During the reporters interview and stay, there was an endless stream of people going to and from work, picking up and delivering express delivery.

Some grass-roots workers have reported that there are many doorways in some old communities and villages in the city. In addition, the blocking is not strong and tight enough, and there are some loopholes.

According to the community police of a urban-rural junction in Wuhan, there are more than 50 intersections in the community, and there are 6 intersections left after the closure, which costs more manpower. At the same time, residents have strong demands for shopping outside, and there is a lot of pressure on community management and control. If the work of community workers is not meticulous enough, it is also easy to cause omissions.

Reporter interview found that there are close contacts with escort for the smooth handling of a pass. At the gate of a residential area in Hanyang District, a middle-aged man is going back to the residential area with vegetables. He told reporters that novel coronavirus pneumonia was admitted to his more than 80 year old mother as a caregiver and he applied for the communitys passport.

Xu de reminded that at present, there are still some people in Wuhan who are moving to prevent and control the epidemic and maintain the basic operation of society, so we should attach great importance to the protection of these groups. The reporter noted that a new case, labeled as a medical staff, was announced by a community in Wuchang District on February 28. Xu de said, in the street secretly visit, have seen several express brothers together to smoke, the risk of infection is greater.