Delta Air Lines is continuing its Atlanta-Johannesburg flights, even though the U.S. has imposed new restrictions on travel from southern African countries because of concerns about a new COVID-19 variant. Atlanta-based Delta operates three flights a week between Hartsfield-Jackson International Airport and Johannesburg. The airline resumed the route, which had been suspended for more than a year due to the pandemic, less than four months ago. The U.S. government announced that it has begun restricting travel from South Africa, along with seven other countries in southern Africa, because of th…

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