A review of CDC records by the news organization ProPublica found that of the more than 750,000 travelers screened at US airports by mid-September 2020, officials found only 24 cases of COVID.25 We now know that many hundreds of cases got through. We closed down most, but not all travel from China early on. But we let travelers continue to arrive from Europe even as the epidemic raged there. Matthew Pottinger and others had urged restricting travel from Europe much earlier than our March 11 ban that affected travelers from twenty-six European countries, but the proposal met resistance from
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