On 2020-09-18 a superspreading event most likely occurred in United Kingdom. 24 days later (2020-10-12) it started to super-spread through the community. A total of 57 copies of this genome (that represents the core of the outbreak), were reported in Gisaid, a proxy for primary transmissions, along with 1371 genomes that are one-step mutation with respect to the core genome (a proxy for secondary transmissions). The signature for the likely superspreading event ends at about 2020-10-19, 31 days after it started, with 161485 sequences found in total.
The last sequence of the superspreading event was collected on 2021-02-13.