Several coronavirus variations have evolved during the COVID-19 pandemic as the virus, SARS-CoV-2, continues to change and adapt. The alterations in many of these variants have little or no effect on how the virus affects humans. However, some factors, such as genetic modifications in the delta variant, can make the coronavirus more contagious) than the original SARS-CoV-2 found in late 2019.In November 2021, a variant of the SARS-CoV-2 coronavirus emerged, and was named omicron by the World Health Organization (WHO).
