U.S. President Joe Biden leaves from the Delaware Orthopaedic Specialist after a check up on his foot injury in Newark, Delaware, U.S., February 6, 2021. REUTERS/Joshua Roberts

U.S. President Joe Biden leaves from the Delaware Orthopaedic Specialist after a check up on his foot injury in Newark, Delaware, U.S., February 6, 2021. REUTERS/Joshua Roberts

U.S. President Joe Biden arrives at the Delaware Orthopaedic Specialists for a check up on his foot injury in Newark, Delaware, U.S. February 6, 2021. REUTERS/Joshua Roberts REFILE - CORRECTING CITY

U.S. President Joe Biden arrives at the Delaware Orthopaedic Specialists for a check up on his foot injury in Newark, Delaware, U.S. February 6, 2021. REUTERS/Joshua Roberts REFILE - CORRECTING CITY

A light remains on at the Delaware Orthopaedic Specialists clinic where President-elect Joe Biden was treated after twisting his ankle while playing with his dog Major in Newark, Delaware, U.S., November 29, 2020. REUTERS/Joshua Roberts

A view of the Delaware Orthopaedic Specialists clinic, where President-elect Joe Biden visited after twisting his ankle while playing with his dog Major, in Newark, Delaware, U.S., November 29, 2020. REUTERS/Joshua Roberts

The motorcade carrying President-elect Joe Biden depart for the Delaware Orthopaedic Specialists clinic after he twisted his ankle while playing with his dog Major, in Wilmington, Delaware, U.S., November 29, 2020. REUTERS/Joshua Roberts

The motorcade carrying President-elect Joe Biden depart for the Delaware Orthopaedic Specialists clinic after he twisted his ankle while playing with his dog Major, in Wilmington, Delaware, U.S., November 29, 2020. REUTERS/Joshua Roberts

The motorcade carrying President-elect Joe Biden arrives at the Delaware Orthopaedic Specialists clinic after he twisted his ankle while playing with his dog Major, in Newark, Delaware, U.S., November 29, 2020. REUTERS/Joshua Roberts

A Secret Service agent waits for President-elect Joe Biden to enter the Delaware Orthopaedic Specialists clinic after twisting his ankle while playing with his dog Major, in Newark, Delaware, U.S., November 29, 2020. REUTERS/Joshua Roberts

President-elect Joe Biden to enter the Delaware Orthopaedic Specialists clinic after twisting his ankle while playing with his dog Major, in Newark, Delaware, U.S., November 29, 2020. REUTERS/Joshua Roberts

Disabled Afghan women play basketball at the Orthopaedic Center of the International Committee of the Red Cross in Kabul, Afghanistan February 7, 2020. Picture taken February 7, 2020. REUTERS/Omar Sobhani

Disabled Afghan women chat with each others before playing basketball at the Orthopaedic Center of the International Committee of the Red Cross in Kabul, Afghanistan February 7, 2020. Picture taken on February 7, 2020. REUTERS/Omar Sobhani

Nilofar Bayat 26, captain of Afghanistan's women wheelchair basketball team, exercises with her coach before playing basketball at the Orthopaedic Center of the International Committee of the Red Cross in Kabul, Afghanistan February 7, 2020. Picture taken February 7, 2020. REUTERS/Omar Sobhani

Members of Afghanistan's women wheelchair basketball team prepare before playing basketball at the Orthopaedic Center of the International Committee of the Red Cross in Kabul, Afghanistan February 7, 2020. Picture taken February 7, 2020. REUTERS/Omar Sobhani

Disabled Afghan women look at their mobile phones before playing basketball at the Orthopaedic Center of the International Committee of the Red Cross in Kabul, Afghanistan February 7, 2020. Picture taken February 7, 2020. REUTERS/Omar Sobhani

Disabled Afghan women play basketball at the Orthopaedic Center of the International Committee of the Red Cross in Kabul, Afghanistan February 7, 2020. Picture taken February 7, 2020. REUTERS/Omar Sobhani

Nilofar Bayat 26, captain of Afghanistan's women wheelchair basketball team, exercises before playing basketball at the Orthopaedic Center of the International Committee of the Red Cross in Kabul, Afghanistan February 7, 2020. Picture taken February 7, 2020. REUTERS/Omar Sobhani

Disabled Afghan women exercise before playing basketball at the Orthopaedic Center of the International Committee of the Red Cross in Kabul, Afghanistan February 7, 2020. Picture taken February 7, 2020. REUTERS/Omar Sobhani

Nilofar Bayat 26, captain of Afghanistan's women wheelchair basketball team, exercises before playing basketball at the Orthopaedic Center of the International Committee of the Red Cross in Kabul, Afghanistan February 7, 2020. Picture taken February 7, 2020. REUTERS/Omar Sobhani

Disabled Afghan women exercise before playing basketball at the Orthopaedic Center of the International Committee of the Red Cross in Kabul, Afghanistan February 7, 2020. Picture taken February 7, 2020. REUTERS/Omar Sobhani

Disabled Afghan women play basketball at the Orthopaedic Center of the International Committee of the Red Cross in Kabul, Afghanistan February 7, 2020. Picture taken February 7, 2020. REUTERS/Omar Sobhani

Disabled Afghan women play basketball at the Orthopaedic Center of the International Committee of the Red Cross in Kabul, Afghanistan February 7, 2020. Picture taken February 7, 2020. REUTERS/Omar Sobhani

Disabled Afghan women play basketball at the Orthopaedic Center of the International Committee of the Red Cross in Kabul, Afghanistan February 7, 2020. Picture taken February 7, 2020. REUTERS/Omar Sobhani

Britain's Prince Harry meets a patient during a visit to the Princess Diana Orthopaedic Centre in Huambo, Angola September 27, 2019. Ian Vogler/Pool via REUTERS

Britain's Prince Harry meets a patient during a visit to the Princess Diana Orthopaedic Centre in Huambo, Angola September 27, 2019. Ian Vogler/Pool via REUTERS

A children await the arrival of Britain's Prince Harry as he visits the Princess Diana Orthopaedic Centre in Huambo, Angola September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry meets patients as he visits the Princess Diana Orthopaedic Centre in Huambo, Angola September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry examines a prosthetic leg as he visits the Princess Diana Orthopaedic Centre in Huambo, Angola September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry meets staff and patients as he visits the Princess Diana Orthopaedic Centre in Huambo, Angola September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry meets Barnaby Jose Mar, 6, as he visits the Princess Diana Orthopaedic Centre in Huambo, Angola September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry meets Barnaby Jose Mar, 6, as he visits the Princess Diana Orthopaedic Centre in Huambo, Angola September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Andrew, Duke of York, Princess Eugenie, Jack Brooksbank and Dr Saroj Patel meet a robot called Pepper, during a visit the Royal National Orthopaedic Hospital to open the new Stanmore Building, in London, Britain March 21, 2019. David Mirzoeff/ Pool via REUTERS

Britain's Prince Andrew, Duke of York meets artist Rolf Knudsen, during a visit the Royal National Orthopaedic Hospital to open the new Stanmore Building, in London, Britain March 21, 2019. David Mirzoeff/ Pool via REUTERS

Princess Eugenie meets patient Maggie Hawkes, 12, during a visit to the Royal National Orthopaedic Hospital to open the new Stanmore Building, in London, Britain March 21, 2019. David Mirzoeff/ Pool via REUTERS

Britain's Prince Andrew, Duke of York and Princess Eugenie visit the Royal National Orthopaedic Hospital to open the new Stanmore Building, in London, Britain March 21, 2019. David Mirzoeff/ Pool via REUTERS

Princess Eugenie meets Ms Christine Bows who cared for her when she in the hospital as a child, during a visit to the Royal National Orthopaedic Hospital to open the new Stanmore Building, in London, Britain March 21, 2019. David Mirzoeff/ Pool via REUTERS

Princess Eugenie and Jack Brooksbank visit the Royal National Orthopaedic Hospital to open the new Stanmore Building, in London, Britain March 21, 2019. David Mirzoeff/ Pool via REUTERS

Princess Eugenie visits the Royal National Orthopaedic Hospital to open the new Stanmore Building, in London, Britain March 21, 2019. David Mirzoeff/ Pool via REUTERS

Princess Eugenie visits the Royal National Orthopaedic Hospital to open the new Stanmore Building, in London, Britain March 21, 2019. David Mirzoeff/ Pool via REUTERS

Princess Eugenie, Jack Brooksbank and Dr Saroj Patel meet a robot called Pepper, during a visit to the Royal National Orthopaedic Hospital to open the new Stanmore Building, in London, Britain March 21, 2019. David Mirzoeff/ Pool via REUTERS

Princess Eugenie visits the Royal National Orthopaedic Hospital to open the new Stanmore Building, in London, Britain March 21, 2019. David Mirzoeff/ Pool via REUTERS

Princess Eugenie meets a robot called Pepper, during a visit to the Royal National Orthopaedic Hospital to open the new Stanmore Building, in London, Britain March 21, 2019. David Mirzoeff/ Pool via REUTERS

Princess Eugenie and Jack Brooksbank visit the Royal National Orthopaedic Hospital to open the new Stanmore Building, in London, Britain March 21, 2019. David Mirzoeff/ Pool via REUTERS

Princess Eugenie visits the Royal National Orthopaedic Hospital to open the new Stanmore Building, in London, Britain March 21, 2019. David Mirzoeff/ Pool via REUTERS

Princess Eugenie arrives at the Royal National Orthopaedic Hospital to open the new Stanmore Building, in London, Britain March 21, 2019. David Mirzoeff/ Pool via REUTERS

Britain's Prince Andrew, Duke of York meets patient Brenda Tilbury during a visit the Royal National Orthopaedic Hospital to open the new Stanmore Building, in London, Britain March 21, 2019. David Mirzoeff/ Pool via REUTERS

Britain's Prince Andrew, Duke of York meets patient Brenda Tilbury during a visit the Royal National Orthopaedic Hospital to open the new Stanmore Building, in London, Britain March 21, 2019. David Mirzoeff/ Pool via REUTERS

Britain's Prince Andrew, Duke of York meets patient Diana Keay during a visit the Royal National Orthopaedic Hospital to open the new Stanmore Building, in London, Britain March 21, 2019. David Mirzoeff/ Pool via REUTERS

Britain's Prince Andrew, Duke of York visits the Royal National Orthopaedic Hospital to open the new Stanmore Building, in London, Britain March 21, 2019. David Mirzoeff/ Pool via REUTERS

The Lifeline Express, a seven-coach train converted into a rolling hospital has crisscrossed India for 27 years to treat people living in areas with scarce healthcare. Lifeline Express has treated about 1.2 million people since its launch in 1991 by the non-profit Impact India Foundation, said chief operating officer and doctor Rajnish Gourh. In a country that spends just one percent of its gross domestic product on healthcare, among the world's lowest, the hospital on wheels fills a critical gap. Decorated with mahogany flower garlands, the sky-blue train parked at the sleepy station in Jalore could be mistaken for a new passenger train. Its medical facilities would rival many Indian public hospitals. It employs 20 permanent paramedic staff, with most doctors volunteering from nearby medical colleges or hospitals. Typically, it spends a month in a district, performing surgery ranging from cataracts and cancer to cleft palates and orthopaedics. REUTERS/Danish Siddiqui SEARCH "LIFELINE" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY. Matching text: INDIA-HEALTHCARE/TRAIN

Members of the Civil Defence carry a participant role-playing as an injured person during an earthquake drill in Managua, Nicaragua, June 30, 2015. REUTERS/Oswaldo Rivas

Mohammad Zaman, an Afghan local policeman who was wounded in Daikundi province, walks with his prosthetic legs at the International Committee of the Red Cross (ICRC) orthopaedic rehabilitation centre in Kabul August 26, 2014. Picture taken August 26, 2014. To match Special Report AFGHANISTAN-MEDICAL/ REUTERS/Omar Sobhani (AFGHANISTAN - Tags: CIVIL UNREST HEALTH)

An injured man receives treatment at a hospital in the southern coastal town of Mariupol, September 6, 2014. A ceasefire struck between Ukrainian forces and pro-Russian separatists in eastern Ukraine was largely holding on Saturday, though residents and combatants said it was likely to prove a brief interlude before renewed fighting. REUTERS/Vasily Fedosenko (UKRAINE - Tags: CIVIL UNREST POLITICS HEALTH CONFLICT TPX IMAGES OF THE DAY)

Britain's Prince Harry (2nd R) takes part in a canoeing activity with patients during his visit to the Rehabilitation Hospital of the Sarah Network in Brasilia, June 23, 2014. Prince Harry visited the Brazilian hospital specializing in rehabilitation, orthopaedic and neuropsychological work as he kicked off a trip that will also include some World Cup matches. REUTERS/Ueslei Marcelino (BRAZIL - Tags: ENTERTAINMENT POLITICS ROYALS SPORT SOCCER WORLD CUP)

Britain's Prince Harry waves next to a doctor after taking part in a canoeing activity with patients during his visit to the Rehabilitation Hospital of the Sarah Network in Brasilia, June 23, 2014. Prince Harry visited the Brazilian hospital specializing in rehabilitation, orthopaedic and neuropsychological work as he kicked off a trip that will also include some World Cup matches. REUTERS/Ueslei Marcelino (BRAZIL - Tags: ENTERTAINMENT POLITICS ROYALS SPORT SOCCER WORLD CUP)

Britain's Prince Harry (C) gestures as he takes part in a canoeing activity with patients during his visit to the Rehabilitation Hospital of the Sarah Network in Brasilia, June 23, 2014. Prince Harry visited the Brazilian hospital specializing in rehabilitation, orthopaedic and neuropsychological work as he kicked off a trip that will also include some World Cup matches. REUTERS/Ueslei Marcelino (BRAZIL - Tags: ENTERTAINMENT POLITICS ROYALS SPORT SOCCER WORLD CUP)

Britain's Prince Harry laughs as he takes part in a canoeing activity with patients during his visit to the Rehabilitation Hospital of the Sarah Network in Brasilia, June 23, 2014. Prince Harry visited the Brazilian hospital specializing in rehabilitation, orthopaedic and neuropsychological work as he kicked off a trip that will also include some World Cup matches. REUTERS/Ueslei Marcelino (BRAZIL - Tags: ENTERTAINMENT POLITICS ROYALS SPORT SOCCER WORLD CUP)

Britain's Prince Harry takes part in a canoeing activity with patients during his visit to the Rehabilitation Hospital of the Sarah Network in Brasilia, June 23, 2014. Prince Harry visited the Brazilian hospital specializing in rehabilitation, orthopaedic and neuropsychological work as he kicked off a trip that will also include some World Cup matches. REUTERS/Ueslei Marcelino (BRAZIL - Tags: ENTERTAINMENT POLITICS ROYALS SPORT SOCCER WORLD CUP)

Britain's Prince Harry (C) takes part in a canoeing activity with patients during his visit to the Rehabilitation Hospital of the Sarah Network in Brasilia, June 23, 2014. Prince Harry visited the Brazilian hospital specializing in rehabilitation, orthopaedic and neuropsychological work as he kicked off a trip that will also include some World Cup matches. REUTERS/Ueslei Marcelino (BRAZIL - Tags: ENTERTAINMENT POLITICS ROYALS SPORT SOCCER WORLD CUP)