Table 1

Epidemiological characteristics of SARS-CoV, MERS-CoV and SARS-CoV-2

Emerged year200220122019
Intermediate hostPalm civet and raccoon dogsDromedary camelsTo be determined
Incubation period2–10 days2–14 days1–14 days
Number of confirmed cases80962519 (as of 31 January 2020)2 072 114 (as of 15 April 2020)
Associated deaths774886 (as of 31 January 2020)138 475 (as of 15 April 2020)
Number of affected countries2927210
  • MERS-CoV, Middle East respiratory syndrome coronavirus ; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2; SARS-CoV, severe acute respiratory syndrome coronavirus .