Superspread event

On 2020-02-29 a superspreading event most likely occurred in Basque Country. 8 days later (2020-03-08) it started to super-spread through the community. A total of 35 copies of this genome (that represents the core of the outbreak), were reported in Gisaid, a proxy for primary transmissions, along with 56 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 2020-03-13, 13 days after it started, with 402 sequences found in total.

The last sequence of the superspreading event was collected on 2020-04-09.