Undocumented Migrants Reintroducing COVID-19, Yunnan Province, ChinaResearch Letter Published on 2021-05-012022-10-31 Journal: Emerging Infectious Diseases [Category] COVID-19, MERS, [키워드] 2019 novel coronavirus disease acute respiratory syndrome Borders China Contamination contribute coronavirus coronavirus disease Coronaviruses COVID-19 Factor Government limit migrants Migration Outbreaks respiratory infections SARS-CoV-2 severe acute respiratory syndrome coronavirus 2 Spread viruses Yunnan Province zoonoses [DOI] 10.3201/eid2705.204944 PMC 바로가기 [Article Type] Research Letter