Effectiveness of a fourth dose of covid-19 mRNA vaccine against the omicron variant among long term care residents in Ontario, Canada: test negative design study

Effectiveness of a fourth dose of covid-19 mRNA vaccine against the omicron variant among long term care residents in Ontario, Canada: test negative design study

OBJECTIVES: To estimate the marginal effectiveness of a fourth versus third dose and the vaccine effectiveness of mRNA covid-19 vaccines BNT162b2 and mRNA-1273 against any infection, symptomatic infection, and severe outcomes (hospital admission or death) related to the omicron variant. DESIGN: Test...

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Bibliographic Details
Main Authors: Buchan, S.A (Author), Costa, A.P (Author), Grewal, R. (Author), Kitchen, S.A (Author), Kwong, J.C (Author), Nguyen, L. (Author), Wilson, S.E (Author)
Format: Article
Language:English
Published: NLM (Medline) 2022
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