A nurse attends to a Covid-19 patient at the intensive care unit of a hospital in Athens on November 20, 2020. - The Greek ministry of health announced the requisition of private hospitals in Thessaloniki on November 19, 2020, as the number of Covid-19 cases in the city is the highest in Greece, facing a second wave of the covid-19 pandemic caused by the novel coronavirus. (Photo by LOUISA GOULIAMAKI / AFP)