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. 2022 Sep 15;19(18):11613. doi: 10.3390/ijerph191811613

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Selection of articles reporting the basic reproduction number of COVID-19 published between 1 December 2019 and 31 September 2020 using a PRISMA flow diagram 2020. Note: ^a PubMed, LitCovid, MEDLINE (via PubMed); ^b MEDLINE Complete, CINAHL Plus with full text, APA PsychInfo (vis EBSCO host); ^c COVID-19 database by the World Health Organization, LILACS (Americas), WPRIM (Western Pacific); ^d British Nursing Index, Coronavirus Research Database (via Proquest); ^e Web of science.