The effective reproductive number of the Omicron variant of SARS-CoV-2 is several times relative to Delta

J Travel Med. 2022 May 31;29(3):taac037. doi: 10.1093/jtm/taac037.


Our review found the effective reproduction number and basic reproduction number of the Omicron variant elicited 3.8 and 2.5 times higher transmissibility than the Delta variant, respectively. The Omicron variant has an average basic and effective reproduction number of 8.2 and 3.6.

Keywords: B.1.1.529; Delta variant; Omicron variant; R0; Re; SARS-CoV-2; effective reproduction number; the basic reproduction number; variants of concern.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Basic Reproduction Number
  • COVID-19*
  • Humans
  • SARS-CoV-2*

Supplementary concepts

  • SARS-CoV-2 variants