{Reference Type}: Letter {Title}: A Commentary on "Omicron SARS-CoV-2 variant: Reasons of emergence and lessons learnt" (Int J Surg 2022;97:106198) Contact-tracing and global vaccine equity: Crucial responses to emergence of the Omicron SARS-CoV-2 variant. {Author}: Rahimi F;Bezmin Abadi AT; {Journal}: Int J Surg {Volume}: 98 {Issue}: 0 {Year}: 02 2022 {Factor}: 13.4 {DOI}: 10.1016/j.ijsu.2022.106244 {Abstract}: