Superspread event

On 2020-03-08 a superspreading event most likely occurred in Portugal. 8 days later (2020-03-16) it started to super-spread through the community. A total of 90 copies of this genome (that represents the core of the outbreak), were reported in Gisaid, a proxy for primary transmissions, along with 182 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 2020-03-29, 21 days after it started, with 1179 sequences found in total.

The last sequence of the superspreading event was collected on 2020-05-01.