A pedestrian walks past a sign directing members of the public to a Covid-19 testing centre in Bolton, northwest England, on May 28, 2021. - British Prime Minister Boris Johnson said Wednesday that Covid-19 vaccines are proving effective against a variant that has spread like wildfire in India and denied the government was being lax on travel from hotspots. (Photo by Oli SCARFF / AFP) (Photo by OLI SCARFF/AFP via Getty Images)
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