A polling station volunteer holds up a ballot during counting after polls closed in the municipal and parliamentary elections in San Salvador, El Salvador, February 28, 2021. REUTERS/Jose Cabezas

Polling station volunteers count ballots after polling closed in the municipal and parliamentary elections in San Salvador, El Salvador, February 28, 2021. REUTERS/Jose Cabezas

Polling station volunteers count ballots after polling closed in the municipal and parliamentary elections in San Salvador, El Salvador, February 28, 2021. REUTERS/Jose Cabezas

Community Organized Relief Effort (CORE) volunteers assist as seniors from the immigrant community receive coronavirus disease (COVID-19) vaccinations, during an event organised by the Mexican consulate and local health officials in Atlanta, Georgia, U.S., February 27, 2021. REUTERS/Amira Karaoud

Volunteer from CORE are briefed before seniors from the immigrant community receive coronavirus disease (COVID-19) vaccinations during an event organised by the Mexican consulate and local health officials in Atlanta, Georgia, U.S., February 27, 2021. REUTERS/Amira Karaoud

Medical students from Emory's School of Medicine, who are volunteering to give the vaccines, are briefed before seniors from the immigrant community receive coronavirus disease (COVID-19) vaccinations during an event organised by the Mexican consulate and local health officials in Atlanta, Georgia, U.S., February 27, 2021. REUTERS/Amira Karaoud

Volunteers prepare before the arrival of seniors from the immigrant community to receive coronavirus disease (COVID-19) vaccinations, during an event organised by the Mexican consulate and local health officials, in Atlanta, Georgia, U.S., February 27, 2021. REUTERS/Amira Karaoud

A volunteer wearing a protective mask lights up a candle during a ceremony to commemorate Makha Bucha Day at the Wat Phra Dhammakaya temple, following the spread of the coronavirus disease (COVID-19), in Pathum Thani province, Thailand, February 26, 2021. REUTERS/Athit Perawongmetha

Volunteers work on computers showing devotees gathering via the Zoom application during a ceremony to commemorate Makha Bucha Day at the Wat Phra Dhammakaya temple, following the spread of the coronavirus disease (COVID-19), in Pathum Thani province, Thailand, February 26, 2021. REUTERS/Athit Perawongmetha

Nordic Skiing - FIS Nordic World Ski Championships - Oberstdorf, Germany - February 25, 2021 Athletes are reflected on a volunteers sunglasses during a Women's Cross Country Sprint Quarter Final Heat REUTERS/Kai Pfaffenbach

Christians volunteers hold Iraqi and Vatican flags as they decorate streets ahead of the planned visit of Pope Francis, in Qaraqosh, Iraq February 22, 2021. Picture taken February 22, 2021. REUTERS/Thaier al-Sudani

Christians volunteers hold Iraqi and Vatican flags as they decorate streets ahead of the planned visit of Pope Francis, in Qaraqosh, Iraq February 22, 2021. Picture taken February 22, 2021. REUTERS/Thaier al-Sudani

Christian volunteers practice the hymns that will be played during the mass to be held by Pope Francis during his planned visit to Iraq, in Erbil, Iraq February 23, 2021. Picture taken February 23, 2021. REUTERS/Charlotte Bruneau

Christians volunteers decorate streets with the pictures of Pope Francis, ahead of his planned visit to to Iraq, in Qaraqosh, Iraq February 22, 2021. Picture taken February 22, 2021. REUTERS/Thaier al-Sudani

A christian volunteer decorates streets with the pictures of Pope Francis, ahead of his planned visit to to Iraq, in Qaraqosh, Iraq February 22, 2021. Picture taken February 22, 2021. REUTERS/Thaier al-Sudani

Volunteers search the area where three-year-old child Tomas Bravo went missing on February 17, when he went out with an uncle in search of animals, according to reports, in the rural area of Caripilun, Arauco, Chile February 22, 2021. REUTERS/Jose Luis Saavedra

Britain's William, Duke of Cambridge talks to RVS volunteers Fliss and Stuart Davidson from Downham market as he visits King's Lynn Corn Exchange Vaccination Centre, King's Lynn, Britain February 22, 2021. Arthur Edwards/Pool via REUTERS

A man wears a glove covered with tar as Israeli soldiers and volunteers clean tar from the sand after an offshore oil spill drenched much of Israel's Mediterranean shoreline, at a beach in Atlit, Israel February 22, 2021. REUTERS/Ronen Zvulun

Policemen ride their horses as they patrol the beach where Israeli soldiers and volunteers clean tar from the sand after an offshore oil spill drenched much of Israel's Mediterranean shoreline, in Atlit, Israel February 22, 2021. REUTERS/Ronen Zvulun

An aerial view shows a pile of plastic bags on the beach as Israeli soldiers and volunteers clean tar from the sand after an offshore oil spill drenched much of Israel's Mediterranean shoreline, in Atlit, Israel February 22, 2021. REUTERS/Ronen Zvulun TPX IMAGES OF THE DAY

A volunteer holds a social distancing sign at the International Defence Exhibition in Abu Dhabi, United Arab Emirates February 22, 2021. REUTERS/Khushnum Bhandari

Volunteers distribute pamphlets during an awareness campaign on the spread of the coronavirus disease (COVID-19) on a street in Mumbai, India, February 22, 2021. REUTERS/Niharika Kulkarni

Volunteers deliver water to local residents in vehicles at Butler Stadium after an unprecedented winter storm in Houston, Texas, U.S., February 21, 2021. REUTERS/Adrees Latif

Volunteers deliver water to local residents in vehicles at Butler Stadium after an unprecedented winter storm in Houston, Texas, U.S., February 21, 2021. REUTERS/Adrees Latif

Volunteers deliver water to local residents in vehicles at Butler Stadium after an unprecedented winter storm in Houston, Texas, U.S., February 21, 2021. REUTERS/Adrees Latif

Volunteer Elizabeth Murray helps hand water to local residents at Butler Stadium after the city of Houston implemented a boil water advisory following an unprecedented winter storm in Houston, Texas, U.S., February 21, 2021. REUTERS/Adrees Latif

A volunteer directs traffic as hundreds of cars line up to receive free cases of water after the city of Houston implemented a boil water advisory following an unprecedented winter storm, at Delmar Stadium in Houston, Texas, U.S., February 19, 2021. REUTERS/Callaghan O'Hare

A volunteer directs traffic as hundreds of cars line up to receive free cases of water after the city of Houston implemented a boil water advisory following an unprecedented winter storm, at Delmar Stadium in Houston, Texas, U.S., February 19, 2021. REUTERS/Callaghan O'Hare

A volunteer shows a picture to children on her mobile phone inside a migrant encampment in Matamoros, Mexico February 18, 2021. Picture taken February 18, 2021. REUTERS/Daniel Becerril

A volunteer takes a selfie with children with a drone, inside a migrant encampment in Matamoros, Mexico February 18, 2021. Picture taken February 18, 2021. REUTERS/Daniel Becerril

Volunteers help distribute water to local residents at a warming center and shelter after record-breaking winter temperatures, as local media reports most residents are without electricity, in Galveston, Texas, U.S., February 17, 2021. REUTERS/Adrees Latif

Volunteer Salvador Cariaga checks on a man suffering from homelessness who has been sleeping on the ground under blankets during record breaking cold weather in Oklahoma City, Oklahoma, U.S., February 15, 2021. REUTERS/Nick Oxford

A medical volunteer is seen between police officers as pro-democracy demonstrators protest to demand the release of their leaders in Bangkok, Thailand, February 13, 2021. Picture taken February 13, 2021. REUTERS/Soe Zeya Tun

A medical volunteer lies on the floor between police officers as pro-democracy demonstrators protest to demand the release of their leaders in Bangkok, Thailand, February 13, 2021. REUTERS/Soe Zeya Tun REFILE - CORRECTING INFORMATION

German Red Cross (DRK) volunteer search in a frostest near neighbourhood for homeless people as they tour with a winter bus through the city to support homeless with hot beverages, sleeping bags and blankets due to extremely weather conditions, amid the coronavirus disease (COVID-19) pandemic during lockdown in Berlin, Germany, February 11, 2021. REUTERS/Fabrizio Bensch

German Red Cross (DRK) volunteer offers hot tea to a homeless woman inside a bank as they tour with a winter bus through the city to support homeless with hot beverages, sleeping bags and blankets due to extremely weather conditions, amid the coronavirus disease (COVID-19) pandemic during lockdown in Berlin, Germany, February 11, 2021. REUTERS/Fabrizio Bensch

German Red Cross (DRK) volunteers talk to a homeless woman inside a bank as they tour with a winter bus through the city to support homeless with hot beverages, sleeping bags and blankets due to extremely weather conditions, amid the coronavirus disease (COVID-19) pandemic during lockdown in Berlin, Germany, February 11, 2021. REUTERS/Fabrizio Bensch

German Red Cross (DRK) volunteer points her torch light to belongings of a homeless person as they tour with a winter bus through the city to support homeless with hot beverages, sleeping bags and blankets due to extremely weather conditions, amid the coronavirus disease (COVID-19) pandemic during lockdown in Berlin, Germany, February 11, 2021. REUTERS/Fabrizio Bensch

German Red Cross (DRK) volunteers stop to search for homeless people at Volkspark Wilmersdorf park as they tour with a winter bus through the city to support homeless with hot beverages, sleeping bags and blankets due to extremely weather conditions, amid the coronavirus disease (COVID-19) pandemic during lockdown in Berlin, Germany, February 11, 2021. REUTERS/Fabrizio Bensch

German Red Cross (DRK) volunteers get briefing before they tour with a winter bus through the city to support homeless with hot beverages, sleeping bags and blankets due to extremely weather conditions, amid the coronavirus disease (COVID-19) pandemic during lockdown in Berlin, Germany, February 11, 2021. REUTERS/Fabrizio Bensch

German Red Cross (DRK) volunteer offers clothes to homeless people as they tour with a winter bus through the city to support homeless with hot beverages, sleeping bags and blankets due to extremely weather conditions, amid the coronavirus disease (COVID-19) pandemic during lockdown in Berlin, Germany, February 11, 2021. REUTERS/Fabrizio Bensch

German Red Cross (DRK) volunteers get briefing before they tour with a winter bus through the city to support homeless with hot beverages, sleeping bags and blankets due to extremely weather conditions, amid the coronavirus disease (COVID-19) pandemic during lockdown in Berlin, Germany, February 11, 2021. REUTERS/Fabrizio Bensch

German Red Cross (DRK) volunteer talks to a homeless people as they tour with a winter bus through the city to support homeless with hot beverages, sleeping bags and blankets due to extremely weather conditions, amid the coronavirus disease (COVID-19) pandemic during lockdown in Berlin, Germany, February 11, 2021. REUTERS/Fabrizio Bensch TPX IMAGES OF THE DAY

German Red Cross (DRK) volunteer takes out clothes for homeless people as they tour with a winter bus through the city to support homeless with hot beverages, sleeping bags and blankets due to extremely weather conditions, amid the coronavirus disease (COVID-19) pandemic during lockdown in Berlin, Germany, February 11, 2021. REUTERS/Fabrizio Bensch

German Red Cross (DRK) volunteer takes out hot tea to offer to a homeless man, as they tour with a winter bus through the city to support homeless with hot beverages, sleeping bags and blankets due to extremely weather conditions, amid the coronavirus disease (COVID-19) pandemic during lockdown in Berlin, Germany, February 11, 2021. REUTERS/Fabrizio Bensch

German Red Cross (DRK) volunteer talks to a homeless person as they tour with a winter bus through the city to support homeless with hot beverages, sleeping bags and blankets due to extremely weather conditions, amid the coronavirus disease (COVID-19) pandemic during lockdown in Berlin, Germany, February 11, 2021. REUTERS/Fabrizio Bensch

A homeless woman drinks hot tea thats she receives from German Red Cross (DRK) volunteers while they tour with a winter bus through the city to support homeless with hot beverages, sleeping bags and blankets due to extremely weather conditions, amid the coronavirus disease (COVID-19) pandemic during lockdown in Berlin, Germany, February 11, 2021. REUTERS/Fabrizio Bensch

A homeless man is pictured in his sleeping bag, while German Red Cross (DRK) volunteer tour with a winter bus through the city to support homeless with hot beverages, sleeping bags and blankets due to extremely weather conditions, amid the coronavirus disease (COVID-19) pandemic during lockdown in Berlin, Germany, February 11, 2021. REUTERS/Fabrizio Bensch

A homeless woman warms her hands on a cup of tea thats she receives from German Red Cross (DRK) volunteer while they tour with a winter bus through the city to support homeless with hot beverages, sleeping bags and blankets due to extremely weather conditions, amid the coronavirus disease (COVID-19) pandemic during lockdown in Berlin, Germany, February 11, 2021. REUTERS/Fabrizio Bensch

German Red Cross (DRK) volunteer talks to a homeless woman inside a bank as they tour with a winter bus through the city to support homeless with hot beverages, sleeping bags and blankets due to extremely weather conditions, amid the coronavirus disease (COVID-19) pandemic during lockdown in Berlin, Germany, February 11, 2021. REUTERS/Fabrizio Bensch

Alpine Skiing - FIS Alpine World Ski Championships Men's Super-G - Cortina d'Ampezzo, Italy - February 11, 2021 A volunteer receives medical attention after sustaining an injury REUTERS/Denis Balibouse

A resident waits to receive a coronavirus disease (COVID-19) rapid test by members of the volunteer group "Vidas Indigenas Importam" (Indigenous Lives Matter) at Igarapes do Diuna indigenous community, on the bank of the Negro river in Manaus, Amazonas state, Brazil, February 6, 2021. Picture taken February 6, 2021. REUTERS/Bruno Kelly

Residents wait to receive a coronavirus disease (COVID-19) rapid test by members of the volunteer group "Vidas Indigenas Importam" (Indigenous Lives Matter) at Igarapes do Diuna indigenous community, on the bank of the Negro river in Manaus, Amazonas state, Brazil, February 6, 2021. Picture taken February 6, 2021. REUTERS/Bruno Kelly

A teenager and a child wait to receive a coronavirus disease (COVID-19) rapid test by members of the volunteer group "Vidas Indigenas Importam" (Indigenous Lives Matter) at Igarapes do Diuna indigenous community, on the bank of the Negro river in Manaus, Amazonas state, Brazil, February 6, 2021. Picture taken February 6, 2021. REUTERS/Bruno Kelly

Residents wait to receive a coronavirus disease (COVID-19) rapid test by members of the volunteer group "Vidas Indigenas Importam" (Indigenous Lives Matter) at Igarapes do Diuna indigenous community, on the bank of the Negro river in Manaus, Amazonas state, Brazil, February 6, 2021. Picture taken February 6, 2021. REUTERS/Bruno Kelly TPX IMAGES OF THE DAY

Residents wait to receive a coronavirus disease (COVID-19) rapid test by members of the volunteer group "Vidas Indigenas Importam" (Indigenous Lives Matter) at Igarapes do Diuna indigenous community on the bank of the Negro river in Manaus, Amazonas state, Brazil, February 6, 2021. Picture taken February 6, 2021. REUTERS/Bruno Kelly

Residents wait to receive a coronavirus disease (COVID-19) rapid test by members of the volunteer group "Vidas Indigenas Importam" (Indigenous Lives Matter) at Igarapes do Diuna indigenous community on the bank of the Negro river in Manaus, Amazonas state, Brazil, February 6, 2021. Picture taken February 6, 2021. REUTERS/Bruno Kelly

Vanderlecia Ortega dos Santos, a nurse from the Witoto tribe and volunteer of "Vidas Indigenas Importam" (Indigenous Lives Matter) group, talks with a resident during a coronavirus disease (COVID-19) rapid test at Igarapes do Diuna indigenous community on the bank of the Negro river in Manaus, Amazonas state, Brazil, February 6, 2021. Picture taken February 6, 2021. REUTERS/Bruno Kelly

A member of the volunteer group, "Vidas Indigenas Importam" (Indigenous Lives Matter) examines a resident before a coronavirus disease (COVID-19) rapid test at Igarapes do Diuna indigenous community on the bank of the Negro river in Manaus, Amazonas state, Brazil, February 6, 2021. Picture taken February 6, 2021. REUTERS/Bruno Kelly

A member of the volunteer group "Vidas Indigenas Importam" (Indigenous Lives Matter) wearing personal protective equipment (PPE) performs a coronavirus disease (COVID-19) rapid test to a resident at Igarapes do Diuna indigenous community, on the bank of the Negro river in Manaus, Amazonas state, Brazil, February 6, 2021. Picture taken February 6, 2021. REUTERS/Bruno Kelly