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. 2020 May 5:M20-1632. doi: 10.7326/M20-1632

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Appendix Figure. — Literature search and selection.

CoV = coronavirus; KQ = key question; MERS = Middle East respiratory syndrome; SARS = severe acute respiratory syndrome.

* Some studies were included for multiple KQs; includes 6 studies that were not peer-reviewed (28, 39, 46, 47, 59, 79) and 3 Chinese-language studies translated into English (48, 52, 78).

† Data from 2 World Health Organization websites on the incidence of SARS-1 (81) and MERS (82) were also included.

‡ Included in the full evidence review (10).