A health worker administers a swab at a temporary COVID-19 novel coronavirus testing centre in Bucheon, south of Seoul, on May 27, 2020. - South Korea reported its biggest jump in coronavirus infections in seven weeks on May 27, driven by a fresh cluster at an e-commerce warehouse on Seoul's outskirts, as millions more pupils went back to school. (Photo by Ed JONES / AFP) (Photo by ED JONES/AFP via Getty Images)