Last month, Beijing issued a new policy making it easier for foreigners to apply for a visa to China if they had received a Chinese vaccine — raising concerns among experts, who warned it risked setting a dangerous precedent which could leave the world separated into vaccine silos.
There was also a practical problem: in many countries, including the United States, it is impossible to get a Chinese vaccine because they have not been approved for use by regulators.
With about half of adults in the US having received at least one Covid-19 shot, many travelers eligible to enter China –…
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