US CDC calls coronavirus Delta variant a 'variant of concern'

The US Centers for Disease Control and Prevention now called the Delta variant of the novel coronavirus, also known as B.1.617.2, a "variant of concern". According to the agency, there is 'mounting evidence' that the Delta variant, which was first reported in India, shows increased transmissibility, potential reduction in neutralisation by some monoclonal antibody treatments under emergency authorisation and potential reduction in neutralisation from sera after vaccination in lab tests.

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