Epidemiological characteristics of SARS-CoV-2 infection outbreak in Shanghai in the Spring of 2022
- Resource Type
- article
- Authors
- XIAN Linfeng; LIN Jiansheng; YU Shichong; ZHAO Yue; ZHAO Pei; CAO Guangwen
- Source
- Shanghai yufang yixue, Vol 34, Iss 4, Pp 294-299 (2022)
- Subject
- sars-cov-2
asymptomatic carrier
confirmed covid-19 case
outbreak
dynamic trend
Medicine
- Language
- Chinese
- ISSN
- 1004-9231
ObjectiveTo investigate the epidemiological characteristics and analyze the incidence trend of SARS-CoV-2 infection in Shanghai, China, and compare with the characteristics of the infection in Jilin Province of China during the same period in 2022 and Wuhan at the beginning of 2020.MethodsInformation of new locally-transmitted confirmed SARS-CoV-2 cases, imported confirmed COVID-19 cases, local asymptomatic SARS-CoV-2 carriers and imported asymptomatic SARS-CoV-2 carriers in Shanghai from March 1 to April 18, 2022 was collected for descriptive analysis.ResultsFrom March 1 to April 18, 2022, a total of 397 933 locally-transmitted SARS-CoV-2 cases were reported in Shanghai. Of those, 27 613 were clinically confirmed cases and 21 were severe cases. Ten deaths were related to COVID-19. The pathogen is Omicron variant BA.2 of SARS-CoV-2. The number of the infected subjects increased rapidly after March 24 and lead to a disease outbreak. Severe and deceased cases had severe comorbidity and were mostly unvaccinated with SARS-CoV-2 vaccines. Asymptomatic SARS-CoV-2 carriers accounted for 93.06%, which is significantly higher than that in Jilin Province during the same period (48.07%, P