A woman wearing a face mask walks past the Pantheon in Rome, Italy, April 21, 2021. (Xinhua/Cheng Tingting)

A man wearing a face mask walks past the Pantheon in Rome, Italy, April 21, 2021. (Xinhua/Cheng Tingting)

A medical worker works in the Department of Intensive Care Unit (ICU) Center at the San Filippo Neri Hospital in Rome, Italy, March 19, 2021. (Photo by Alberto Lingria/Xinhua)

A medical staff member works in a COVID-19 unit at a hospital in Bologna, Italy, on March 10, 2021. (Photo by Gianni Schicchi/Xinhua)