reporter: once again, a pandemic weary world has been plunged into uncertainty following the discovery of a new variant by south african scientists which could be more transmissible and vaccine resistant. one nation after another has shut its doors to countrieson across southern africa. the u.s. follows tomorrow, ands israel has imposed the world s toughest restrictions to date, banning all travelers for the next two weeks. now is the time to act fast, early, hard and strong. reporter: but with omicron already circling the globe, public health experts say border closures don t help. there is bitter anger here over the hasty travel bans. south africa s foreign ministry says the country is being punished for its ability to spot variants quickly. there is also smoldering resentment amongst many africans who believe they are bearing the
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