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Linking key intervention timing to rapid decline of the COVID-19 effective reproductive number to quantify lessons from mainland China #MMPMID32535298
Xiao Y; Tang B; Wu J; Cheke RA; Tang S
Int J Infect Dis 2020[Aug]; 97 (?): 296-298 PMID32535298show ga
Effective reproductive numbers (R(t)) were calculated from data on the COVID-19 outbreak in China and linked to dates in 2020 when different interventions were enacted. From a maximum of 3.98 before the lockdown in Wuhan City, the values of R(t) declined to below 1 by the second week of February, after the construction of hospitals dedicated to COVID-19 patients. The R(t) continued to decline following additional measures in line with the policy of "early detection, early report, early quarantine, and early treatment." The results provide quantitative evaluations of how intervention measures and their timings succeeded, from which lessons can be learned by other countries dealing with future outbreaks.