New Brazil coronavirus variant found in nearly half of Amazon city cases

A variant of the novel coronavirus already accounts for about half of new infections in the Brazilian Amazonian city of Manaus, raising concerns about a greater risk of spread, a researcher warned on Friday.

A team led by immunologist Ester Sabino collected genomic data from Covid-19 tests in Manaus that indicated 42 percent of the confirmed cases were infected by the new variant, which has mutations similar to the British and South African variants...