Employees wearing protective equipment walk in a passage at the headquarters of Russia's biotech company BIOCAD, which is developing its own vaccine against the new coronavirus and working on another one in cooperation with the country's virus research centre in Siberia, Vektor, in Strelna on May 20, 2020. (Photo by OLGA MALTSEVA / AFP) (Photo by OLGA MALTSEVA/AFP via Getty Images)


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