The UK variant has gained a new mutation. Notably, the additional mutation — known as E484K — is the same one found in the Brazilian and South African variants of SARS-CoV-2, but it appears to have emerged separately in the UK. A report published this week by Public Health England (PHE) noted the spike protein mutation E484K, found in the Brazilian and South African variants, has been detected in at least 11 UK variant sequences and that “preliminary information suggests more than one acquisition event.” In other words, a concerning mutation appears to have emerged separately on an already concerning UK variant of the virus.