Timing of Community Mitigation and Changes in Reported COVID-19 and Community Mobility ― Four U.S. Metropolitan Areas, February 26–April 1, 2020 Published on 2020-04-172022-10-30 Journal: Morbidity and Mortality Weekly Report [키워드] change COVID-19 Mitigation Mobility [Category] COVID-19, PMC URL [DOI] 10.15585/mmwr.mm6915e2 [Article Type] Full Report [Source] PMC All Keywords 【제목키워드】 COVID-19, Mobility, Mitigation, change,