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. 2022 Mar 8;7(4):e356–e365. doi: 10.1016/S2468-2667(22)00040-8

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© 2022 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY 4.0 license

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Simulated number of SARS-CoV-2 cases with and without face masks at different vaccination coverages

(A) Vaccination with 70% efficacy against infections, with SARS-CoV-2 R₀=5. (B) Vaccination with 70% efficacy against infections, with SARS-CoV-2 R₀=8. (C) Vaccination with 50% efficacy against infections, with SARS-CoV-2 R₀=5. Vaccination coverage is defined as the time at which immune protection was achieved, 2 weeks after vaccination.