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The global tally of confirmed cases of the coronavirus-borne illness COVID-19 topped 250 million on Monday, according to data aggregated by Johns Hopkins University, as the U.S. reopened to vaccinated travelers from 33 countries after 18 months of restrictions.
Travelers are required to show proof of vaccination and a recent negative coronavirus test to be allowed to enter. Most of the 33 countries are in Europe, which, amid still-rising cases, was described by the World Health Organization last week as the epicenter of the…
