(FILES) In this file photo taken on April 20, 2020 Doctor Marco (R) and nurse Manu, wearing protective gear react at the end of their shift in a corridor of the level intensive care unit, treating COVID-19 patients, at the San Filippo Neri hospital in Rome. - The World Health Organization said on October 21, 2021 that 80,000 to 180,000 health care workers may have been killed by Covid-19 up to May this year, insisting they should be prioritised for vaccination. (Photo by Alberto PIZZOLI / AFP) 23/01/2020 - 02:01