Nine-month-old female koala cub Millaa Millaa is seen in its enclosure at Schoenbrunner Tiergarten zoo amid the coronavirus disease (COVID-19) outbreak in Vienna, Austria, February 22, 2021. REUTERS/Lisi Niesner

Nine-month-old female koala cub Millaa Millaa is seen with its mother in their enclosure at Schoenbrunner Tiergarten zoo amid the coronavirus disease (COVID-19) outbreak in Vienna, Austria, February 22, 2021. REUTERS/Lisi Niesner

People queue to see nine-month-old female koala cub Millaa Millaa in its enclosure at Schoenbrunner Tiergarten zoo amid the coronavirus disease (COVID-19) outbreak in Vienna, Austria, February 22, 2021. REUTERS/Lisi Niesner

A common squirrel monkey cub is carried on the back of its mother in their enclosure at Schoenbrunner Tiergarten zoo amid the coronavirus disease (COVID-19) outbreak in Vienna, Austria, February 22, 2021. REUTERS/Lisi Niesner

A common squirrel monkey cub is carried on the back of its mother in their enclosure at Schoenbrunner Tiergarten zoo amid the coronavirus disease (COVID-19) outbreak in Vienna, Austria, February 22, 2021. REUTERS/Lisi Niesner

A common squirrel monkey cub is carried on the back of its mother in their enclosure at Schoenbrunner Tiergarten zoo amid the coronavirus disease (COVID-19) outbreak in Vienna, Austria, February 22, 2021. REUTERS/Lisi Niesner

A vintage car passes by a state building with a sign that reads in Spanish: "Homeland or Death - We shall prevail" in Havana, Cuba, February 19, 2021. REUTERS/Alexandre Meneghini

Rescued grey seal cubs wait for fish during their quarantine at LPA animal refuge in Calais, France, February 13, 2021. Picture taken on February 13, 2021. REUTERS/Pascal Rossignol

A grey seal cub warms up under an infrared lamp during his quarantine at LPA animal refuge in Calais, France, February 9, 2021. Picture taken on February 9, 2021. REUTERS/Pascal Rossignol

A rescued grey seal cub eats fish during his quarantine at LPA animal refuge in Calais, France, February 9, 2021. Picture taken on February 9, 2021. REUTERS/Pascal Rossignol

An endangered Humboldt penguin cub is seen next to pelicans during a census carried out by the National Forestry Corporation (CONAF) on Cachagua Island in Zapallar, Chile February 8, 2021. Picture taken February 8, 2021. REUTERS/Rodrigo Garrido

Jose Moya (C), the representative in Cuba of the Pan American Health Organization (PAHO), takes part in a news conference in Havana, Cuba, November 5, 2020. Picture taken November 5, 2020. REUTERS/Alexandre Meneghini

The U.S. flag flies next to security guarding the U.S. embassy in Havana, Cuba, January 12, 2021. REUTERS/Alexandre Meneghini

A cat sits beside a hand sanitizer at the entrance of a public market amid concerns about the spread of the coronavirus disease (COVID-19), in Havana, Cuba, January 11, 2021. Photo taken January 11, 2021. REUTERS/Alexandre Meneghini

A man looks at a mobile phone at the seafront Malecon amid concerns about the spread of the coronavirus disease (COVID-19), in Havana, Cuba, January 11, 2021. Photo taken January 11, 2021. REUTERS/Alexandre Meneghini TPX IMAGES OF THE DAY

A car passes by a house in quarantine amid concerns about the spread of the coronavirus disease (COVID-19), in Havana, Cuba, January 11, 2021. Photo taken January 11, 2021. REUTERS/Alexandre Meneghini

Filip Medunic, a tourist from Germany and Sandra Alvarez are seeing reflected in the mirror of a vintage car after getting married in Havana, Cuba, January 6, 2021. REUTERS/Alexandre Meneghini

Filip Medunic, a tourist from Germany, chats with his fiancee Sandra Alvarez moments before getting married in Havana, Cuba, January 6, 2021. REUTERS/Alexandre Meneghini

Tourists from Germany take pictures at the Revolution Square in Havana, Cuba, January 5, 2021. Picture taken on January 5, 2021. REUTERS/Alexandre Meneghini

Tourists from Mexico and Canada walk in downtown Havana, Cuba, January 5, 2021. Picture taken on January 5, 2021. REUTERS/Alexandre Meneghini

Tourists from Russia, staying in a beach resort, walk in downtown during a day trip to Havana, Cuba, January 6, 2021. REUTERS/Alexandre Meneghini

Tourists from Russia, staying in a beach resort, walk in downtown during a day trip to Havana, Cuba, January 6, 2021. REUTERS/Alexandre Meneghini

Tourists ride in a vintage car at the seafront in Havana, Cuba, January 6, 2021. REUTERS/Alexandre Meneghini

Children listen to their teacher amid concerns about the spread of the coronavirus disease (COVID-19), in Havana, Cuba, January 6, 2021. REUTERS/Alexandre Meneghini

Five-day-old lion cubs rest on the ground at Taigan safari park in Belogorsk, Crimea January 3, 2021. Picture taken January 3, 2021. REUTERS/Alexey Pavlishak TPX IMAGES OF THE DAY

Five-day-old lion cubs rest on the ground at Taigan safari park in Belogorsk, Crimea January 3, 2021. Picture taken January 3, 2021. REUTERS/Alexey Pavlishak

A zookeeper holds a five-day-old lion cub at Taigan safari park in Belogorsk, Crimea January 3, 2021. Picture taken January 3, 2021. REUTERS/Alexey Pavlishak

Five-day-old lion cubs rest on the ground at Taigan safari park in Belogorsk, Crimea January 3, 2021. Picture taken January 3, 2021. REUTERS/Alexey Pavlishak

Five-day-old lion cubs rest on the ground at Taigan safari park in Belogorsk, Crimea January 3, 2021. Picture taken January 3, 2021. REUTERS/Alexey Pavlishak

Founder of Taigan safari park Oleg Zubkov poses for a picture next to five-day-old lion cubs in Belogorsk, Crimea January 3, 2021. Picture taken January 3, 2021. REUTERS/Alexey Pavlishak

A zookeeper holds five-day-old lion cubs at Taigan safari park in Belogorsk, Crimea January 3, 2021. Picture taken January 3, 2021. REUTERS/Alexey Pavlishak

Five-day-old lion cubs rest on the ground at Taigan safari park in Belogorsk, Crimea January 3, 2021. Picture taken January 3, 2021. REUTERS/Alexey Pavlishak

Five-day-old lion cubs rest on the ground at Taigan safari park in Belogorsk, Crimea January 3, 2021. Picture taken January 3, 2021. REUTERS/Alexey Pavlishak

People play dominoes in Havana, Cuba, January 2, 2021. REUTERS/Alexandre Meneghini

Followers of the Yoruba religion perform in Havana, Cuba, January 2, 2021. REUTERS/Alexandre Meneghini

Followers of the Yoruba religion wait for a ceremony in Havana, Cuba, January 2, 2021. REUTERS/Alexandre Meneghini

Followers of the Yoruba religion perform in Havana, Cuba, January 2, 2021. REUTERS/Alexandre Meneghini

Mauricio Alonso, who rents out rooms in his apartment, speaks on the phone in Havana, Cuba December 22, 2020. Picture taken December 22, 2020. REUTERS/Alexandre Meneghini

Antoine Garcia (R) attends to a client at a beauty salon in Havana, Cuba December 21, 2020. Picture taken December 21, 2020. REUTERS/Alexandre Meneghini

Children play dominoes beside masks for sale, amid the outbreak of the coronavirus (COVID-19), in downtown Havana, Cuba, December 23, 2020. REUTERS/Alexandre Meneghini

Isabel Gonzalez, 65, sews masks for sale amid the outbreak of the coronavirus (COVID-19), in her bedroom in downtown Havana, Cuba, December 23, 2020. REUTERS/Alexandre Meneghini TPX IMAGES OF THE DAY

A woman walks past the entrance of the company Financiera Cimex S.A. headquarters in Havana, Cuba, December 21, 2020. REUTERS/Alexandre Meneghini

People line up to pay tribute to late Eusebio Leal, the official historian of Havana, next to the Capitol in Havana, Cuba, December 17, 2020. REUTERS/Alexandre Meneghini

People line up to pay tribute to late Eusebio Leal, the official historian of Havana, next to the Capitol in Havana, Cuba, December 17, 2020. REUTERS/Alexandre Meneghini

People pay tribute to late Eusebio Leal, the official historian of Havana, at the Capitol in Havana, Cuba, December 17, 2020. REUTERS/Alexandre Meneghini

Children pay tribute to late Eusebio Leal, the official historian of Havana, at the Capitol in Havana, Cuba, December 17, 2020. REUTERS/Alexandre Meneghini

People pay tribute to late Eusebio Leal, the official historian of Havana, at the Capitol in Havana, Cuba, December 17, 2020. REUTERS/Alexandre Meneghini

Children line up to pay tribute to late Eusebio Leal, the official historian of Havana, at the Capitol in Havana, Cuba, December 17, 2020. REUTERS/Alexandre Meneghini

Children pay tribute to late Eusebio Leal, the official historian of Havana, at the Capitol in Havana, Cuba, December 17, 2020. REUTERS/Alexandre Meneghini

Worshiper Eugenio Hernandez pauses on his way to the shrine of Saint Lazarus during the annual pilgrimage at the town of Rincon, Cuba, December 16, 2020. Picture taken on December 16, 2020. REUTERS/Alexandre Meneghini

Worshipers have their temperature checked at the entrance of the shrine of Saint Lazarus during the annual pilgrimage at the town of Rincon, Cuba, December 16, 2020. Picture taken on December 16, 2020. REUTERS/Alexandre Meneghini

A Catholic priest and health workers stand in front of worshipers next to the entrance of the shrine of Saint Lazarus during the annual pilgrimage at the town of Rincon, Cuba, December 16, 2020. Picture taken on December 16, 2020. REUTERS/Alexandre Meneghini

Worshipers relax during the annual pilgrimage of Saint Lazarus at the town of Rincon, Cuba, December 16, 2020. Picture taken on December 16, 2020. REUTERS/Alexandre Meneghini

A worshiper buys flowers on her way to the shrine of Saint Lazarus during the annual pilgrimage at the town of Rincon, Cuba, December 16, 2020. Picture taken on December 16, 2020. REUTERS/Alexandre Meneghini

A worshiper walks her way to the shrine of Saint Lazarus during the annual pilgrimage at the town of Rincon, Cuba, December 16, 2020. Picture taken on December 16, 2020. REUTERS/Alexandre Meneghini

Cuba's First Secretary of the Communist Party and former President Raul Castro takes part in a session of the National Assembly in Havana, Cuba, December 16, 2020. Irene Perez/Courtesy of Cubadebate/Handout via Reuters. ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

Cuba's First Secretary of the Communist Party and former President Raul Castro and Cuba's President Miguel Diaz-Canel arrive for a session of the National Assembly in Havana, Cuba, December 16, 2020. Irene Perez/Courtesy of Cubadebate/Handout via Reuters. ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

Men work near the U.S. Embassy in Havana, Cuba, December 15, 2020. REUTERS/Alexandre Meneghini

A view of Cuban and U.S. flags beside the U.S. Embassy in Havana, Cuba, December 15, 2020. REUTERS/Alexandre Meneghini

Cuban scientists speak during a news conference in Havana, Cuba, December 15, 2020. REUTERS/Alexandre Meneghini