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. 2022 Jul 6;378:e071502. doi: 10.1136/bmj-2022-071502

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© Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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Fig 1 — Marginal effectiveness of a fourth dose of mRNA covid-19 vaccine against omicron variant related outcomes among long term care residents in Ontario, Canada, compared with residents who received a third dose 84 or more days previously