ADVANCE ONLINE PUBLICATION |
Disease profile and plasma neutralizing activity of post-vaccination Omicron BA.1 infection in Tianjin, China: a retrospective study
Hong Zheng1,† , Yunlong Cao2,3,†,* , Xiaosu Chen4,† , Fengmei Wang5 , Ye Hu4 , Weiliang Song3 , Yangyang Chai6 , Qingqing Gu2 , Yansong Shi4 , Yingmei Feng7 , Shuxun Liu8 , Yan Xie1 , Xiaoliang Sunney Xie2,3 , Wentao Jiang1 , Zhongyang Shen1,*1Organ Transplant Center, NHC Key Laboratory for Critical Care Medicine, Tianjin First Central Hospital, Nankai University, Tianjin, China
SARS-CoV-2 Omicron variant BA.1 first emerged on the Chinese mainland on January 8, 2022, in Tianjin and caused a large wave of infections.1 Four rounds of mass testing of its ~14 million residents were launched on January 9, 12, 15, and 20, respectively. As of February 7, 2022, a total of 430 individuals were tested positive for Omicron BA.1, with no new infections detected for the following 16 days.