COVID-19 reinfection not likely, South Korean officials say | WNT
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Scientists don't know how long immunity lasts, but they said that relapsing cases were actually because of testing failures. WATCH THE FULL EPISODE OF 'WORLD NEWS TONIGHT': https://bit.ly/2Zjmrqc WATCH OTHER FULL EPISODES OF WORLD NEWS TONIGHT: http://abc.go.com/shows/world-news-tonight WATCH WORLD NEWS TONIGHT ON HULU: https://hulu.tv/33iKepm #WorldNewsTonight #DavidMuir #
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