Coronavirus was brought into the UK on at least 1,300 separate occasions, a major analysis of the genetics of the virus shows. The study, by the Covid-19 Genomics UK consortium (Cog-UK), completely quashes the idea that a single "patient zero" started the whole UK outbreak. The analysis also finds China, where the pandemic started, had a negligible impact on cases in the UK. Instead those initial cases came mostly from European countries.
