Epidemiology & Infection Prevention Program, University of California, Irvine Health (UCI Health), Irvine.
Division of Infectious Diseases, University of California, Irvine School of Medicine, Irvine.
JAMA Netw Open. 2021 Jul 1;4(7):e2115980. doi: 10.1001/jamanetworkopen.2021.15980.
This cohort study investigates asymptomatic and symptomatic COVID-19 case rates before and after the initial vaccine rollout among health care personnel in Orange County, California.
本队列研究调查了加利福尼亚州奥兰治县卫生保健人员在初始疫苗推出前后无症状和有症状的 COVID-19 病例发生率。