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Reinfections More Likely With New Coronavirus Variants, Evidence Suggests

03:53
Workers check oxygen tanks at a hospital in Manaus, Brazil. Severe oxygen shortages as a second coronavirus wave is surging have prompted local authorities to airlift patients to other parts of Brazil. (Bloomberg via Getty Images)
Workers check oxygen tanks at a hospital in Manaus, Brazil. Severe oxygen shortages as a second coronavirus wave is surging have prompted local authorities to airlift patients to other parts of Brazil. (Bloomberg via Getty Images)

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