Table 1 Attack rates of pandemic or seasonal influenza and COVID-19 in Hubei province [1, 2]

From: Successful containment of COVID-19: the WHO-Report on the COVID-19 outbreak in China

 Influenza 1957Influenza 1968Influenza 2009Influenza 1977–8COVID-19, Hubei 2020
Community attack rate confirmed cases18.5–26.8%15%17,52.2–31% < 2%
Secondary household contact attack rate8.4–23%a20%a4–6%16%3–10%
  1. aNot laboratory confirmed