Tourists eat a meal in a nearly-empty restaurant terrace in Venice, Italy, Friday, Feb. 28, 2020. In late February, Italy became the epicenter of COVID-19 in Europe and a cautionary tale of what happens when a health care system in even one of the wealthiest parts of the world collapses under the weight of pandemic sick and dead. (AP Photo/Francisco Seco)

A volunteer nurse tends to homeless people on the streets of Milan, Italy, on Tuesday, March 24, 2020. (AP Photo/Antonio Calanni)

A gondolier looks at his smartphone as he waits for clients in Venice, Italy, Friday, Feb. 28, 2020, during the coronavirus outbreak. (AP Photo/Francisco Seco)

Nurse Cristina Settembrese adjusts two masks to her face during her work shift in the COVID-19 ward at the San Paolo hospital in Milan, Italy on Friday, April 10, 2020. Settembrese cares for for COVID-19 patients in a hospital ward, and when she goes home, her personal isolation begins by her own choice. (AP Photo/Luca Bruno)

Patient Nazzareno Santilli, 60, under oxygen CPAP (continuous positive air pressure) headgear ventilation, smiles with Dr. Elisabetta Teti in the sub-intensive COVID unit of the Tor Vergata Polyclinic Hospital, in Rome, Saturday, Nov. 7, 2020. Communication is challenging when patients wear oxygen helmets and Teti is covered by layers of protective gear. But her energy and warmth cross the barriers. (AP Photo/Alessandra Tarantino)

Ana Travezano, 39, a nurse at the Humanitas Gavazzeni Hospital in Bergamo, Italy poses for a portrait at the end of her shift Friday, March 27, 2020. The intensive care doctors and nurses on the front lines of the coronavirus pandemic in Italy are almost unrecognizable behind their masks, scrubs, gloves and hairnets. But the thin battle armor donned at the start of each shift is their only barrier to contagion. (AP Photo/Antonio Calanni)

Dr. Giovanni Passeri plays cards with his 10-year-old son Francesco, left, each of them wearing surgical masks, as he waits for lunch at home in Parma, northern Italy, Wednesday, April 8, 2020. Passeri implemented his own protocols to reduce chances he could inadvertently spread coronavirus contamination to his family. On rare occasions, when he feels that the emotional strain on Francesco is too much, he allows him closer after they've both slipped on surgical masks. (AP Photo/Domenico Stinellis)

Nurse Ginevra Fattori adjusts her protective equipment before entering the sub-intensive care unit of the San Filippo Neri hospital in Rome, Thursday, Oct. 29, 2020. (AP Photo/Alessandra Tarantino)

Eighty-two-year-old patient Mario reads a note on his medical condition during a routine examination by Dr. Giovanni Passeri, upper left, and his assistant Dr. Mariaconcetta Terracina during the night shift in the COVID-19 section of the Maggiore Hospital in Parma, northern Italy, on Wednesday, April 8, 2020. Mario has been under oxygen CPAP (continuous positive air pressure) headgear ventilation and he could only communicate in writing because the hissing sound of the oxygen made it difficult for him to hear the doctor's voice. Mario's health conditions worsened since his admission on March 28. He died on the evening of April 14. (AP Photo/Domenico Stinellis)

The Eco di Bergamo newspaper features several pages of obituaries in its March 17, 2020 edition, in Mediglia, Italy, Wednesday, March 18, 2020. Bergamo is at the heart of the hardest-hit province in Italy's hardest-hit region of Lombardy. (AP Photo/Luca Bruno)

Soldiers patrol Milan, Italy, on Friday, March 20, 2020, with the Duomo gothic cathedral in the background. Mayors of many towns in Italy are asking for ever more stringent measures on citizens' movements to help contain the surging infections of the coronavirus. (AP Photo/Luca Bruno)

Ana Travezano, 39, a nurse at the Humanitas Gavazzeni Hospital in Bergamo, Italy poses for a portrait Nov. 11, 2020. (AP Photo/Antonio Calanni)

Alyn Valeriou trains with his 3-year old daughter, Maria Cristina, outside his caravan at the Romina Orfei Circus, parked in San Nicola la Strada, near Naples, Italy, on Sunday April 19, 2020. Anamaria and her husband Alyn Valeriou are thinking to leave the circus to open an educational farm. "But now we are stuck here" said Anamaria. The Orfei itinerant circus made its last performance on March 1, after that show, the national shutdown of public events to contain the spreading of the COVID-19 in Italy blocked 94 animals and nine families. (AP Photo/Alessandra Tarantino)

Sabatino Di Girolamo, mayor of Roseto degli Abruzzi, left, lays his hands on the the casket of his mother, Annunziata Ginoble, before her inhumation at the small cemetery of Montepagano, central Italy, Tuesday, May 12, 2020. Under new regulations imposed by the COVID-19 pandemic, only 15 people wearing face masks are allowed to attend funerals and have to respect distancing requirements. (AP Photo/Domenico Stinellis)

Spectators wearing masks wait for a show at La Scala theater in Milan, Italy, on Monday, July 6, 2020. The opera house reopened Monday after a four-month shutdown due to the COVID-19 restriction measures. (AP Photo/Antonio Calanni)

People in their cars and on lounging chairs watch the movie "Tolo Tolo" at the Paolo Ferrari drive-in cinema in Ostia, on Rome's seaside on Thursday, July 9, 2020. The drive-in cinema that could host up to 460 cars and 50 motorbikes helps in social distancing amid the COVID-19 pandemic. (AP Photo/Alessandra Tarantino)

Pope Francis puts on his face mask as he attends an inter-religious ceremony for peace in the Basilica of Santa Maria in Aracoeli, in Rome Tuesday, Oct. 20, 2020 (AP Photo/Gregorio Borgia)

Sabatino Di Girolamo, center, mayor of Roseto degli Abruzzi, with his son, Francesco, right, and his sister, Marisa Di Felice, mourns his mother Annunziata, lying in state in the morgue of the Giuseppe Mazzini Hospital in Teramo, central Italy, Tuesday, May 12, 2020. Under new regulations imposed by the COVID-19 pandemic only three people wearing face masks are allowed inside the morgue. (AP Photo/Domenico Stinellis)

Light reflects off the cobblestones of an empty street next to La Scala theater, left, early Sunday, Oct. 25, 2020. On its second night of curfew, Milan's main streets and piazzas remained empty. The financial capital of the country had also been known for its bustling night life. (AP Photo/Luca Bruno)

A man stands on the unusually empty Navigli area, a popular evening spot of restaurants and pubs along canals in Milan, Italy, Thursday, Oct. 22, 2020, as authorities imposed curfews in a bid to slow the spread of COVID-19. (AP Photo/Luca Bruno)