Super-infection cases, in which a huge number of individuals are concurrently contaminated, are already a typical occurrence of the COVID-19 pandemic. The spread of a single super-spread event—a two-day international business conference held in Boston in February 2020—generated more than 90 additional investigations. Control mechanisms are important for super-spreading incidents to continue as they are.

Reference

Superspreading drives the COVID pandemic — and could help to tame it. https://www.nature.com/articles/d41586-021-00460-x