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. 2021 Apr 2;62:127126. doi: 10.1016/j.ufug.2021.127126

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Fig. 4 — Epidemiological cross-sectional statistics. (a) Infection number of COVID-19 in 13 Wuhan’s districts (Until May 8, 2020), (b) Temporal variation of infection case and epidemic-free community number in Wuhan, and (c) Relationship between AIR and CSI.