The explosive spread of the Alpha coronavirus variant through Britain last autumn was a “super-seeding event”, a large international study has shown.
It was driven not only by biological changes that made the virus more transmissible but also by the way large numbers of infected people carried Alpha around the country from London and south-east England, where it originated.
The research, led by Oxford university, combined extensive genetic analysis of Covid-19 samples with human mobility data to map the way Alpha — formerly known as B.1.1.7 or the Kent variant — came to dominate Covid-19 cases in the UK within four months.
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