MONEYWEB app instead? US now has a Covid-19 mutation that likely confers partial resistance to antibodies produced by vaccines. By Robert Langreth, Bloomberg 1 Feb 2021 12:30 Image: Bloomberg A Covid-19 mutation that likely confers partial resistance to the antibodies produced by vaccines is now in the US, spurring scientists to probe new ways to battle a disease thatâs constantly changing and could remain active for years. The South African variant has already spread quickly across the African continent and has been seen in at least 24 countries outside of Africa. It was reported in South Carolina on January 28 and in Maryland two days later. If that looks like just a beachhead, note that a UK mutation first seen in Colorado on December 29 has been detected in 29 US states in less than a month. Both variants are considered more contagious than the original strain.