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As more infectious coronavirus variants first detected in Britain and South Africa circulate globally, President Joe Biden plans to bar travel by non-citizens into the United States from South Africa. A White House official said Sunday that the South Africa travel ban would go into effect on Jan. 30 and that an existing ban would be extended on non-citizen travelers from Europe and Brazil, The New York Times reported. The U.S. Centers for Disease Control and Prevention recently warned that the British coronavirus variant could become the dominant source of infections in the United States by March and would likely trigger surges in cases and deaths. As of Monday, the British variant has been detected in 22 states, the CDC reported. The agency has also announced a new policy that requires all arriving international air passengers, regardless of vaccination status, to be tested for the coronavirus within three days of their departure for the United States, and to provide written documentation of their test results or proof of having recovered from COVID-19. The South African coronavirus variant has yet to be detected in the United States, but small studies published last week show that it is less susceptible to antibodies created by natural infection or by vaccines made by Pfizer and Moderna, which have both been authorized for emergency use in the United States, the… read on > read on >