New ’Bristol’ strain of Covid-19 detected in United States

A new mutation of the highly contagious Covid-19 variant that was first discovered in the United Kingdom has been found in the US, the CDC said. Revealing this at a White House media briefing, Dr Rochelle Walensky, CDC director, said the first case of the B117 variant with the E484K mutation – known as the ’Bristol variant’ ¬ has been identified, but declined to specify where it was found.