Smallpox Eradication: African Origin, African Solutions, and Relevance for COVID-19 † Published on 2021-02-182022-10-28 Journal: The American Journal of Tropical Medicine and Hygi [키워드] African COVID-19 origin Relevance smallpox [저자] Joel G. Breman [Category] COVID-19, MERS, PMC URL [DOI] 10.4269/ajtmh.20-1557 [Article Type] Presidential Address [Source] PMC All Keywords 【제목키워드】 COVID-19, origin, African, smallpox, Relevance,