Countries tighten borders, vaccines in short supply

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WASHINGTON (AFP) – A number of countries tightened their borders against a surge in variant strains of the deadly coronavirus as the United States on Saturday ordered travellers to wear masks on most public transport.
With doses of the different COVID-19 jabs so far approved for use still in relatively short supply – and mass inoculation programmes in their early stages – Britain and the EU have become embroiled in an ugly row over the shots they had been promised by drugmaker AstraZeneca.
The jab developed by the British-Swedish firm is only the third to be rolled out in Europe. But the compa

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