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The move comes after Biden’s chief medical adviser, Anthony Fauci, warned that new, more infectious Covid strains in South Africa and Brazil could reduce the potency of the two vaccines being administered in the U.S.
No exemptions for airlines: The White House official also confirmed that the administration would not allow airlines to make exemptions to a separate order set to go into effect this week, which will require all international travelers to show proof of a negative Covid test before entering the U.S. Airlines had requested temporary waivers permitting them to carry some travelers coming from countries with limited testing capacity.
However, CDC officials told Reuters that they would consider case-by-case humanitarian exemptions for some travelers.
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