Vaccination linked to COVID-19 decline in healthcare workersIn Orange County, California, COVID-19 vaccination in healthcare personnel (HCP) was connected with a 94% reduction in HCP cases 3 weeks after second doses of mRNA-based vaccines were administered, according to a JAMA Network Open research letter yesterday.The researchers included 10,188 HCP from the University of California Irvine Health, the only academic medical center in the county, and tracked COVID-19 infections from Nov 1, 2020, to Mar 31, 2021.
Participants were screened daily for COVID symptoms and fever and were tested if positive. In addition, about 250 asymptomatic HCP were tested per week up to Dec 13, after which 500 per week were tested.