The coronavirus variant that was first spotted last month in the U.K. has now spread to dozens of countries, likely passed on by infected people who traveled around the world and unknowingly brought the microscopic invaders with them.
LONDON — The COVID-19 vaccine developed by the British drug group AstraZeneca and the University of Oxford has achieved a “winning formula” for efficacy, the company’s chief executive said on Sunday.
All airline passengers arriving in the US from the UK are to be required to test negative for Covid-19 within 72 hours of departure amid concerns about a new coronavirus variant.
From 28 December travellers will need to provide written documentation of their test result to airlines.
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