https://publichealthmatters.blog.gov.uk/2021/04/22/disease-detectives-finding-the-uks-dominant-covid-19-variant-and-the-race-to-understand-its-impact/
Disease Detectives – Finding the UK’s dominant COVID-19 variant and the race to understand its impact
In late November last year, epidemiologists began noticing some unusual patterns in the spread of COVID-19 in the South East of England.
A national lockdown had been in place since the start of the month, yet despite initial drop offs, cases in parts of Kent, Essex and London had started to increase again.
The problem was flagged to a small team of PHE scientists and external academics in the specialised field of viral genomics – the study of a virus’s genetic make-up.