WASHINGTON (Reuters) -Top U.S. infectious disease official Dr. Anthony Fauci said on Friday that a ban on flights from southern Africa was a possibility and the United States was rushing to gather data on the new COVID-19 variant. No decision to halt flights had yet been made, he said. Global authorities have reacted with alarm to the new variant, detected in South Africa, with the European Union and Britain among those tightening border controls as scientists seek to find out if the mutation was vaccine-resistant. The World Health Organization (WHO), however, has cautioned against hasty measu…

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