Theoretical and practical exploration of multi-level，classified and stratified prevention and control of COVID-19 in communities based on a seven-color-coded population management model
ZHANG Tao，ZHANG Yimin，LI Yan，CHEN Dongdong，LI Jue，ZHU Shanzhu
Chinese General Practice . 2020, (19): 2379 -2384 .  DOI: 10.12114/j.issn.1007-9572.2020.00.346

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