2020-10-31

Xinjiang adds 61 asymptomatic infections and found cross-state cases Experts:still infectious, we must strictly prevent dead ends

By yqqlm yqqlm

Source:Global Times-Global Net

[Global Times-Global Net Reporter Fan Lingzhi, Bai Yunyi, Liu Caiyu, and Zhao Juehui] According to the press conference of the People’s Government of Xinjiang Uygur Autonomous Region on the 31st The Kashgar epidemic prevention and control work press conference reported that from 24:00 on October 30 to 18:00 on October 31, Xinjiang newly reported 61 cases of asymptomatic infection, of which 46 cases were in Shufu County, and Ke, which is adjacent to Shufu County Zilesu Kirgiz Autonomous Prefecture (abbreviated as Kezhou) Aktao County 15 cases. Chinese epidemiologists told the Global Times reporter on the evening of the 31st that the 61 newly-infected people may not be detected because they were in the early stages of the first round of nucleic acid testing. The detection this time may be”clearing dead spots.””The necessary steps. However, experts remind the locals to be highly vigilant, and related prevention and control dead ends and virus sources need to be found through detailed epidemiological investigations.

Why are there 61 new cases? Expert:It is necessary to fail to detect duplicate testing in the early stage of infection.

According to the official report, due to the fact that Akto County, Atushi City, Wuqia County borders Shufu County of Kashgar Prefecture. After the outbreak of Shufu County, Kezhou completed nucleic acid tests for all employees on the 27th, and the results were all negative. On the 30th, Kezhou carried out the second round of free nucleic acid testing for key populations in key areas. From 24:00 on the 30th to 18:00 on the 31st, 15 cases of asymptomatic infection were newly reported in the neighboring townships of Akto County and Shufu County. All personnel under medical observation. The two rounds of free nucleic acid tests for all employees in Kashgar were completed on the 27th and 31st, respectively. Except for the confirmed cases and asymptomatic infections that have been announced, the test results of the rest were negative. That is to say, including the newly notified 61 cases of asymptomatic infections, all new asymptomatic infections are from Zhanmin Township and surrounding townships in Shufu County, and all are personnel under quarantine medical observation.

A medical expert from Xinjiang told the Global Times on the 31st that these 61 asymptomatic patients were negative in the first round of nucleic acid testing, and then the second round of nucleic acid testing was positive. There are two situations:First, they may be in the early stages of the disease, and the nucleic acid test failed to detect. The expert’s judgment is also consistent with the situation reported at the autonomous region press conference. Gu Yingsu, deputy director of the Xinjiang Health Commission, said, span class=”entity-word” data-gid=”20445022″>New coronavirus has a certain time interval from infection to detection. If the first nucleic acid sampling happens to fall within this time interval, it may be possible Not to be checked out. According to the incubation period of the new coronavirus, the incubation period of new coronary pneumonia is 1 to 14 days, and the common incubation period is 3 to 7 days. This means that about 90%of people will have a positive nucleic acid test within 3 to 7 days after infection, and some People are less than 3 days, and some people are more than 7 days. The above-mentioned experts believe that another possibility is the existence of”false negatives”.

This is why Kashgar and surrounding areas have launched the second round of nucleic acid testing. Chen Xi, an associate professor at the Yale School of Public Health, said in an interview with the Global Times on the 31st that the repeated nucleic acid testing being implemented in Xinjiang is necessary. If the scope of infection is not large, repeated testing can avoid statistical errors due to”false negatives”.”After all, throat swabs are sampled in the upper respiratory tract, and the virus content is often low in the early stages of infection.” According to Gu Yingsu’s introduction at the press conference, the second round of nucleic acid testing was carried out to accurately identify and screen in the shortest time. Those who are still in the incubation period. This is not only conducive to the implementation of the”four mornings” requirements, to buy time for early treatment and early recovery, but also to prevent the spread of the epidemic, and make every effort to protect the lives and health of people of all ethnic groups.

Chen Xi also mentioned that there may be a gap between the medical transportation conditions in Xinjiang and the mainland. If the samples are collected too early or too late, or the samples are not properly stored, transported and processed, they may face challenge.

New infections or”removing dead spots” are necessary steps but still need to be highly vigilant

Because of Kaiqike Township, Kare, Akto County The 15 new cases in Pilal Township are adjacent to Shufu County. The above-mentioned Xinjiang experts believe that it is not ruled out that the epidemic has spread in these places at the beginning. They are all close contacts or close contacts of close contacts. However, the specific transmission trajectory is unclear. However, the expert said that Kezhou, like Shufu County, adopted home quarantine measures in the early stages of the epidemic. Although there are signs of early spread of the epidemic in the community, these potential cases have now been detected,”as long as they are detected. The epidemic can be controlled”.

“The newly discovered infection may be a necessary step to’remove dead spots’. Only through this step can we grasp the infection situation of the population as much as possible.” Chen Xi said.

Wang Guangfa, director of the Department of Respiratory and Critical Care Medicine at Peking University First Hospital, told the Global Times on the 31st that if measures are taken properly, there are no obvious loopholes in prevention and control, and the number of new cases will be around 7 days. Will decline, and there will be a significant decline in about 14 days. Therefore, he believes that whether the epidemic situation in Xinjiang is completely controlled requires a few more days of observation, and now we should maintain a high degree of vigilance.

Experts:The prevention and control of blind spots and the determination of the source of the virus need to be found by epidemiological investigation

Wang Guangfa believes that from public information, new cases are still They are all asymptomatic infections. This means that the local screening is very timely, but on the other hand, it may also indicate that the situation is not too optimistic. “Asymptomatic infections are not only temporarily symptomatic, but still contagious”, if they continue to appear Asymptomatic infection, there may be some blind spots in prevention and control.”These blind spots require detailed epidemiological investigations. Because of language and other factors, it may be difficult to conduct circulation in ethnic areas, but this is a work that must be strengthened.”

“Infectious diseases There are three main prevention and control measures:controlling the source of infection, cutting off the route of transmission, and protecting susceptible persons. The most important of these is to control the source of infection. If the source of infection is not known, prevention and control will be very difficult.” Wang Guangfa said If the source cannot be found, it will be difficult to”block” the virus in the first place, and the virus may continue to emerge from this channel, and it is difficult for people who are in contact with this source to be discovered in time, and may become new Source of infection. For example, the source of the epidemic situation in Shufu County has not yet been clarified, so was the epidemic situation in Aktao County, which was nearby, passed from Shufu County? Or is it the source of Shufu County? It is still impossible to tell,”The place where the epidemic occurred afterward is not necessarily the’downline’ that was passed on, it may also be the source, or it may be two branches that spread from the same source.”

Chen Xi also expressed the same view. He believes that in addition to testing, the work of tracing close contacts is very important at this moment, because this can stifle community transmission in the bud, so as not to have to carry out a larger-scale closure in the future.

Wang Guangfa finally suggested that Xinjiang should quickly screen and track the flow of cold-chain food and key personnel associated with the concentrated outbreak in Shufu County. “This may be better than an undifferentiated large-scale whole Worker inspection is more efficient, because the most important thing now is to be fast.”