We report a severe acute respiratory syndrome coronavirus 2 superspreading event in the Netherlands after distancing rules were lifted in nightclubs, despite requiring a negative test or vaccination. This occurrence illustrates the potential for rapid dissemination of variants in largely unvaccinated populations under such conditions. We detected subsequent community transmission of this strain.
Keywords: Amsterdam; COVID-19; SARS-CoV-2; coronavirus disease; outbreaks; phylogenetics; respiratory infections; severe acute respiratory syndrome coronavirus 2; superspreading; the Netherlands; viruses; zoonoses.