Meteorological conditions and nonpharmaceutical interventions jointly determined local transmissibility of COVID-19 in 41 Chinese cities: A retrospective observational study.

Our estimates of R t in Shenzhen resemble those in a modeling study but differ from another study which estimated an increasing trend of R t before Jan 20 [ 2 , 18 ].This difference could come from (1) whether R t is attributed to the onset time of the infectee (the previous study) or the onset time of the infector (our study), and (2) the consideration of imported secondary cases as infectees (the previous study) or infectors (our study).

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