Eurosurv. Using an influenza surveillance system to estimate the number of SARS-CoV-2 infections in Beijing, China, weeks 2 to 6 2023

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• Li Zhang[SUP]1,*[/SUP] , Yi Zhang[SUP]2,*[/SUP] , Wei Duan[SUP]1[/SUP] , Shuangsheng Wu[SUP]1[/SUP] , Ying Sun[SUP]1[/SUP] , Chunna Ma[SUP]1[/SUP] , Quanyi Wang[SUP]1[/SUP] , Daitao Zhang[SUP]1,**[/SUP] , Peng Yang[SUP]1,**[/SUP]

With COVID-19 public health control measures downgraded in China in January 2023, reported COVID-19 case numbers may underestimate the true numbers after the SARS-CoV-2 Omicron wave. Using a multiplier model based on our influenza surveillance system, we estimated that the overall incidence of SARS-CoV-2 infections was 392/100,000 population in Beijing during the 5 weeks following policy adjustment. No notable change occurred after the Spring Festival in early February. The multiplier model provides an opportunity for assessing the actual COVID-19 situation.

https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2023.28.11.2300128#html_fulltext