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High attack rate of SARS-CoV-2 B.1.1.529 among two-dose vaccinated populations in two indoor entertainment setting outbreaks
- Publication Year :
- 2022
-
Abstract
- We estimated attack rates of SARS-CoV-2 B.1.1.529 (Omicron) infection among people attending a nightclub and a graduation ball where >95% had at least 2 vaccine doses. Attack rates were 295/535(55.1%) and 102/189(54.0%) respectively (mean: 5 days post-event). At the ball, attack rates increased with time since vaccination: 12.5% among those vaccinated 1-2 months previously; 68.0% among those vaccinated 3 + months previously; such differences were not found at the nightclub. Recent vaccination prevents Omicron infection, but is time and setting-dependent, emphasising the importance of non-pharmaceutical public health measures in addition to vaccine booster doses to maximise protection in high-risk contexts.
- Subjects :
- Coronavirus
COVID-19
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.od.......293..8fde0abe4d202b91d3c4d21d0c3f6d16