China officially announced that the COVID epidemic was basically over
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China officially announced that the COVID epidemic was basically over
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China officially announced that the COVID epidemic was basically over even the first local XBB.1.5 variant was still found
On the afternoon of February 23, the Joint Prevention and Control Mechanism of the State Council held a press conference.
Liang Wannian, head of the expert group of the National Health Commission’s Epidemic Response and Disposal Leading Group, pointed out: “Judging from the characteristics of the epidemic itself, the COVID-19 epidemic has basically ended. ”
Infections are still sporadic and sporadic
According to the briefing of the press conference: At this stage, the COVID-19 infection is “still in a sporadic and localized state of distribution.”
On the morning of February 20, the Education Bureau of Xihu District, Hangzhou City issued a notice on the suspension of classes of multiple positive students in a primary school in Xihu District.
According to Hangzhou Daily’s understanding from the Hangzhou Epidemic Prevention and Control Headquarters, there are currently three schools involved in the epidemic: 10 cases of COVID-19 infection for the first time in a primary school in Xihu District; 5 cases of first infection with COVID-19 in a middle school in Gongshu District; 12 students in a primary school in Shangcheng District have fever , for the aggregation of influenza transmission .
According to the relevant person in charge, at present, influenza A and norovirus infections have also entered a period of frequent occurrence, and symptoms such as fever are not necessarily caused by the new coronavirus.
Since February , some schools and classes in Shanghai Qingpu, Tianjin Beichen, Zhejiang Ningbo, Zhejiang Jinhua and other places have also suspended classes due to students having fever, most of which are influenza A.
The Beijing Center for Disease Control and Prevention stated in its latest response to the current situation of the local epidemic situation: The local clusters of epidemics since February were all caused by seasonal influenza or norovirus.
In terms of overall data, the national epidemic has come to an end since February . According to the CDC announcement, since December 9, 2022, the number and rate of positive cases reported nationwide have declined after peaking.
On December 22 last year, the number of positive cases reached a peak of 6.94 million. By February 16, the number of positive cases reported in various provinces was 10,720.
Source: Chinese Center for Disease Control and Prevention
In this press conference, Liang Wannian proposed to evaluate whether to get out of the pandemic from five aspects:
1) Infection rate status, the indicator is the cumulative and new infection rate;
2) Population immunity level, the indicator is the immune protection rate;
3) Whether the pathogen has undergone qualitative and public health-significant variation;
4) Medical and health supply, the indicator is The number of daily outpatient visits, hospitalization, severe illness, death, and the response capacity of the medical and health system;
5) Prevention and control capabilities, that is, from mechanisms to control methods and capabilities.
“The decisive victory means that we have withstood the impact and test of this round of the epidemic and established a relatively good population immunity barrier. If we look at the characteristics of the epidemic itself, it can be said that the epidemic has basically ended, but it cannot be said that it is Completely over. “
The new strain has not seen any secondary cases, will there still be a peak of infection?
On February 15, the Chinese Center for Disease Control and Prevention notified the first local XBB.1.5 case.
Chang Zhaorui, a researcher at the Communication and Prevention Division of the Chinese Center for Disease Control and Prevention, introduced at today’s press conference that seven imported cases of XBB.1.5 have been found in China since January 8.
On February 3, a local related XBB.1.5 case caused by an imported case was found, which was a core close contact. After detailed epidemiological investigation, health monitoring of relevant close contacts and expert research and judgment, no secondary cases were found.
XBB.1.5, as the mutant strain to focus on, was once regarded as the biggest potential driver of the “second wave” peak .
As early as January 11, a risk assessment report published by WHO showed that from October 22, 2022 to January 11, 2023, XBB.1.5 infection cases have been detected in 38 countries, and more than 80 cases have been reported in the United States. % of cases .
The WHO warned that XBB.1.5 is the variant with the strongest ability to escape antibodies known so far, and may cause more serious outbreaks.
Cao Yunlong, an associate researcher at Peking University’s Biomedical Frontier Innovation Center (BIOPIC) and a leading scientist at Beijing Changping Laboratory, mentioned in an interview with the media that different mutant strains can lead to multiple infection peaks every year: “Most countries have experienced four waves .
Major infection peaks are mostly induced by different mutant strains, once every three months on average. ”
However, according to the previous foreign situation, the impact of the epidemic is indeed gradually weakening. The peak of the death toll of the XBB epidemic in Singapore from October to November last year was not obvious. The Singaporean government has stated that there is no evidence that XBB is more pathogenic, with even a 30% lower risk of hospitalization compared to Omicron BA.5.
In a Portuguese study, BA.5 caused a significantly lower peak of infection than BA.1, although it had immune escape against BA.1 or BA.2. In two waves of epidemics with an interval of about 90 days, the anti-infection effectiveness of past infection against BA.5 was as high as 75.3% .
There are indeed differences in immune escape between different Omicron substrains, but as far as individuals are concerned, the risk of reinfection in the short term is still very low, and the protective effect of past infection on severe illness is relatively more durable and efficient.
At present, in the monitoring of new coronavirus mutant strains in China, if the first reported (including imported and local) and international epidemic strains of focus are found, individual case investigations of infected persons, core close contact investigations, and risk research and judgment will be carried out.
“China has just experienced a pandemic, and the neutralizing antibodies remaining in the human body will provide immune protection in the short term. According to expert research and analysis, it is less likely to trigger a new round of large-scale epidemics in the near future.”
China officially announced that the COVID epidemic was basically over even the first local XBB.1.5 variant was still found
(source:internet, reference only)
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