MELBOURNE, AUSTRALIA - MAY 25: A nurse conducts a Covid-19 test at a drive through Covid-19 testing facility at the Melbourne Showgrounds on May 25, 2021 in Melbourne, Australia. Victorian health authorities are investigating the source of a new community coronavirus cluster in Melbourne's north after four new COVID-19 cases were confirmed on Monday. The cases are all linked, being close family members across two households who are now in isolation. (Photo by Asanka Ratnayake/Getty Images)
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