Medical staff work in a COVID-19 unit at a hospital in Bologna, Italy, on March 10, 2021. As of Wednesday, Italy has registered some 3.1 million coronavirus cases, including 2.5 million recoveries and over 100,000 fatalities, according to the Health Ministry. (Photo by Gianni Schicchi/Xinhua)

A medical staff member works in a COVID-19 unit at a hospital in Bologna, Italy, on March 10, 2021. As of Wednesday, Italy has registered some 3.1 million coronavirus cases, including 2.5 million recoveries and over 100,000 fatalities, according to the Health Ministry. (Photo by Gianni Schicchi/Xinhua)

A medical staff member works in a COVID-19 unit at a hospital in Bologna, Italy, on March 10, 2021. As of Wednesday, Italy has registered some 3.1 million coronavirus cases, including 2.5 million recoveries and over 100,000 fatalities, according to the Health Ministry. (Photo by Gianni Schicchi/Xinhua)

A medical staff member works in a COVID-19 unit at a hospital in Bologna, Italy, on March 10, 2021. As of Wednesday, Italy has registered some 3.1 million coronavirus cases, including 2.5 million recoveries and over 100,000 fatalities, according to the Health Ministry. (Photo by Gianni Schicchi/Xinhua)

Medical staff work in a COVID-19 unit at a hospital in Bologna, Italy, on March 10, 2021. As of Wednesday, Italy has registered some 3.1 million coronavirus cases, including 2.5 million recoveries and over 100,000 fatalities, according to the Health Ministry. (Photo by Gianni Schicchi/Xinhua)

A medical staff member works in a COVID-19 unit at a hospital in Bologna, Italy, on March 10, 2021. As of Wednesday, Italy has registered some 3.1 million coronavirus cases, including 2.5 million recoveries and over 100,000 fatalities, according to the Health Ministry. (Photo by Gianni Schicchi/Xinhua)