There are 13,000 new local infections, and Zhang Wenhong speaks again!

From 0 to 24:00 on April 2, 31 provinces (autonomous regions and municipalities directly under the Central Government) and the Xinjiang Production and Construction Corps reported 1,506 new confirmed cases. Among them, 51 cases were imported from abroad;

There were 1,455 new home-grown confirmed cases

There were 956 cases in Jilin City, including 723 cases in Changchun City, 230 cases in Jilin City, 2 cases in Siping City, and 1 case in Baicheng City;

There were 438 cases in Shanghai, including 107 cases in Pudong New Area, 57 cases in Minhang District, 44 cases in Xuhui District, 38 cases in Putuo District, 35 cases in Baoshan District, 31 cases in Hongkou District, 27 cases in Huangpu District, 27 cases in Jiading District, 25 cases in Jing'an District, 19 cases in Yangpu District, 8 cases in Songjiang District, 8 cases in Fengxian District, 6 cases in Changning District, 3 cases in Qingpu District, and 3 cases in Chongming District;

There were 11 cases in Zhejiang, including 2 cases in Hangzhou City, 2 cases in Huzhou City, 2 cases in Jinhua City, 1 case in Ningbo City, 1 case in Jiaxing City, 1 case in Shaoxing City, 1 case in Quzhou City, and 1 case in Lishui City;

There were 8 cases in Fujian, including 7 in Quanzhou City and 1 case in Xiamen City;

There were 6 cases in Shandong, including 3 cases in Jinan City, 1 case in Qingdao City, 1 case in Dezhou City, and 1 case in Heze City;

There were 6 cases in Sichuan, including 3 cases in Chengdu City, 2 cases in Suining City, and 1 case in Deyang City;

5 cases in Heilongjiang, all in Harbin City;

There were 5 cases in Jiangsu, including 3 cases in Suqian City, 1 case in Xuzhou City, and 1 case in Suzhou City;

3 cases in Hainan, all in Sanya City;

There were 3 cases in Shaanxi, including 2 cases in Baoji City and 1 case in Xi'an City;

2 cases in Liaoning, both in Shenyang;

There were 2 cases in Anhui, including 1 case in Huainan City and 1 case in Huaibei City;

There were 2 cases in Jiangxi, including 1 case in Nanchang City and 1 case in Ji'an City;

There were 2 cases in Guangdong, including 1 case in Guangzhou City and 1 case in Zhaoqing City;

1 case in Tianjin, in Nankai District;

1 case in Hebei, in Handan City;

1 case in Shanxi, in Datong City;

1 case in Hunan, in Hengyang City;

1 case in Guangxi, in Yulin City;

1 case in Xinjiang, in Urumqi City,

Including 118 cases converted from asymptomatic infected people to confirmed cases (73 cases in Shanghai, 28 cases in Jilin, 5 cases in Zhejiang, 5 cases in Fujian, 4 cases in Shandong, 1 case in Jiangxi, 1 case in Guangdong, 1 case in Sichuan). There were no new deaths. There were no new suspected cases.

As of 24:00 on April 2, according to reports from 31 provinces (autonomous regions and municipalities directly under the Central Government) and the Xinjiang Production and Construction Corps, there are 26,167 confirmed cases* (including 57 severe cases), 123933 cured and discharged cases**, 4,638 cumulative deaths, 154738 confirmed cases and 19 suspected cases. A total of 2390486 close contacts have been traced, and 372642 close contacts are still under medical observation.

There were 11,691 new cases of indigenous asymptomatic infection

There were 7788 cases in Shanghai, including 1949 cases in Pudong New Area, 991 cases in Xuhui District, 765 cases in Minhang District, 631 cases in Huangpu District, 587 cases in Jiading District, 565 cases in Songjiang District, 445 cases in Baoshan District, 351 cases in Putuo District, 313 cases in Hongkou District, 301 cases in Jing'an District, 256 cases in Yangpu District, 221 cases in Qingpu District, 150 cases in Fengxian District, 108 cases in Chongming District, 94 cases in Changning District, and 61 cases in Jinshan District;

There were 3499 cases in Jilin City, including 3100 cases in Changchun City, 397 cases in Jilin City, 1 case in Baishan City, and 1 case in Baicheng City;

There were 93 cases in Anhui, including 61 cases in Huainan City, 14 cases in Fuyang City, 7 cases in Chuzhou City, 3 cases in Ma'anshan City, 2 cases in Wuhu City, 2 cases in Bengbu City, 2 cases in Lu'an City, 1 case in Anqing City, and 1 case in Xuancheng City;

There were 43 cases in Liaoning, including 33 cases in Shenyang City, 4 cases in Huludao City, 3 cases in Dalian City, and 3 cases in Yingkou City;

There were 42 cases in Jiangsu, including 15 cases in Suzhou City, 12 cases in Nantong City, 7 cases in Suqian City, 3 cases in Zhenjiang City, 1 case in Nanjing City, 1 case in Wuxi City, 1 case in Xuzhou City, 1 case in Yancheng City, and 1 case in Taizhou City;

There were 42 cases in Fujian, including 40 cases in Quanzhou City, 1 case in Fuzhou City, and 1 case in Putian City;

There were 38 cases in Jiangxi, including 29 cases in Nanchang City, 6 cases in Fuzhou City, and 3 cases in Shangrao City;

There were 35 cases in Hebei, including 22 cases in Handan City and 13 cases in Baoding City;

There were 20 cases in Henan, including 16 cases in Zhoukou City, 2 cases in Zhengzhou City, and 2 cases in Yongcheng City;

There were 18 cases in Hubei, including 14 cases in Suizhou City, 3 cases in Huangshi City, and 1 case in Wuhan City;

There were 12 cases in Heilongjiang, including 8 cases in Jiamusi City, 2 cases in Harbin City, 1 case in Yichun City, and 1 case in Heihe City;

There were 8 cases in Zhejiang, including 4 cases in Jiaxing City, 2 cases in Hangzhou City, 1 case in Ningbo City, and 1 case in Jinhua City;

There were 8 cases in Shandong, including 3 cases in Linyi City, 1 case in Zibo City, 1 case in Zaozhuang City, 1 case in Dezhou City, 1 case in Liaocheng City, and 1 case in Binzhou City;

There were 8 cases in Guangdong, including 5 cases in Dongguan City, 2 cases in Jieyang City, and 1 case in Shenzhen City;

7 cases in Gansu, all in Lanzhou City;

There were 6 cases in Hainan, including 5 cases in Sanya City and 1 case in Haikou City;

There were 6 cases in Yunnan, including 2 cases in Kunming City, 2 cases in Qujing City, and 2 cases in Dehong Dai Jingpo Autonomous Prefecture;

There were 5 cases in Sichuan, including 3 cases in Chengdu City and 2 cases in Leshan City;

There were 4 cases in Xinjiang, including 2 cases in Changji Hui Autonomous Prefecture and 2 cases in Bayingolin Mongol Autonomous Prefecture;

There were 3 cases in Tianjin, including 2 cases in Xiqing District and 1 case in Jinnan District;

There were 3 cases in Guangxi, including 2 cases in Guilin City and 1 case in Baise City;

1 case in Hunan, in Changsha City;

1 case in Chongqing, in Jiangbei District;

Guizhou 1 case, in southwest Qianxi Buyi and Miao Autonomous Prefecture.

On the same day, 137 cases of confirmed cases (19 cases imported from abroad) were lifted from medical observation on the same day; 1,841 cases were released from medical observation (84 cases imported from abroad); and 73,689 asymptomatic infected people were still under medical observation (1,105 cases imported from abroad).

A total of 329012 confirmed cases have been reported from Hong Kong, Macao and Taiwan. Among them, there were 304897 cases in Hong Kong Special Administrative Region (50,093 cases discharged from hospital, 8,061 deaths), 82 cases in Macao Special Administrative Region (82 cases discharged from hospital), and 24,033 cases in Taiwan Region (13,742 cases discharged from hospital, 853 deaths).

Note: *Jilin nuclear increase of 1 case

**Jilin province reduced by 1 case

Zhang Wenhong: Why does Shanghai take antigen screening?

When is it more effective to block the virus?

At present, in hong Kong, Jilin, Shanghai and other places in the fight against the new crown epidemic, antigen detection reagents have been used, why is this testing method adopted? When is this test more effective in stopping the spread of the virus?

On April 2, Zhang Wenhong, head of the Shanghai New Crown Pneumonia Medical Treatment Expert Group and director of the Department of Infectious Diseases of Huashan Hospital Affiliated to Fudan University, said at the "2022 International Symposium on Antigen Detection of the New Coronavirus" held online that the current nucleic acid-based detection method in China is aimed at achieving zero social clearance, but nucleic acid testing requires a lot of social capabilities, and antigens can achieve self-testing as a means of compensation.

However, Zhang Wenhong also pointed out that the time window faced by antigen detection is relatively narrow, and it is difficult to detect early or incubation period. The sensitivity and specificity of antigen detection reagents can also be affected by the application environment. Antigen testing within five days of symptoms of Opichron virus infection is relatively sensitive, but antigen detection during the virus incubation period is not as good as nucleic acid detection.

Why Shanghai adopts antigen detection as an auxiliary means of screening, Zhang Wenhong said, the reason is that through antigen self-testing, basic infection rate data can be obtained, even if there is a high false positive rate, you can also screen to catch a part of the source of infection, block the spread of the virus, this practice has also reached a consensus with the national expert group. After global screening, in order to achieve the zeroing goal as soon as possible, during the intermittent period of nucleic acid detection, auxiliary antigen detection can also improve detection efficiency.

When is antigen testing best?

Zhang Wenhong pointed out that when the closed community once the nucleic acid screening is positive, the full screening is limited by time in a short period of time, the antigen self-test can be started at the first time, and some asymptomatic infected people can be screened out to avoid the further spread of the virus. Another example is the hospital emergency department, patients without nucleic acid reports can do antigen screening before the nucleic acid report comes out, and implement first treatment. In terms of anti-shutdown in medical institutions, nucleic acids can also be used for regular testing and auxiliary antigen self-examination.

"Antigen testing is mainly used in the acute infection period, that is, sample testing within 5-7 days of the onset of symptoms in suspected populations (Omiljun virus infection can be considered within 5 days), antigens can be used as a screening of close contacts, and continuous screening can improve detection rates." Due to its sensitivity, the antigen test for COVID-19 is not suitable for screening in populations targeting zeroing, but can be used as a supplement to nucleic acid testing capacity. ”

Zhang Wenhong said that during the epidemic period, antigen detection can reduce the efficiency of virus transmission by finding the source of infection as soon as possible. In the zeroing stage, antigens can be used as an auxiliary means for regular nucleic acid detection, such as for elderly care homes, hospitals, etc., and can implement reverse protection for vulnerable groups such as the elderly.

Source: National Health Commission website, The Paper

Editor-in-charge: Wang Yuanfang

Editor: Sun Xiaoting Zhang Yongqun