What is the R naught of coronavirus disease 2019 (COVID-19)?

Updated: Jan 12, 2021
  • Author: Setu K Patolia, MD, MPH; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
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Although dynamic, the basic reproduction number (R0 /R naught) is an epidemiologic entity that helps predict the expected number of cases from exposure to a single case, assuming all the individuals in the given population are susceptible. The R0 of measles is 12-18, by far the highest known to humankind. The R0 of seasonal influenza is around 0.9-2.1. Based on the data available so far, the R0 of COVID-19 is 1.4-3.9.

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