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Listed here databases is searched PubMed, Cochrane, Embase, China National Knowledge Infrastructure, Chinese Science and Technology Periodical Database, and Wanfang database from October 1, 2019 to March 1, 2020. Randomized studies and quasi-randomized or potential managed clinical trials of CM that reported data on COVID-19 clients may be included. Research choice, information removal, quality evaluation, and assessment of danger bias will undoubtedly be carried out by 2 reviewers indi