Geographic Differences in COVID-19 Cases, Deaths, and Incidence — United States, February 12–April 7, 2020 Published on 2020-04-172022-10-30 Journal: Morbidity and Mortality Weekly Report [키워드] COVID-19 difference Geographic United States [Category] COVID-19, PMC URL [DOI] 10.15585/mmwr.mm6915e4 [Article Type] Full Report [Source] PMC All Keywords 【제목키워드】 COVID-19, United States, difference, Geographic,