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Just as mandatory PCR testing for travellers had become a thing of the past in many parts of the world, regulations are being reintroduced as Covid-19 cases surge once more.
Much of this is driven by the surge in cases from China, after Beijing dismantled its zero-Covid policies, including regular PCR testing of its population, triggering concern around the world.
The US, Australia and UK, for example, are to impose PCR testing requirements on any travellers from China from Thursday. The US…