Sisira Kumara Dissanayake, 35, shows a heart surgery scar on his son Chamindu Dissanayake, 4, who has been diagnosed with acute myeloid leukaemia, as they prepare to travel back to their home after being discharged from Apeksha Hospital, in Colombo, Sri Lanka, August 15, 2022. "It takes between 8 and 10 hours to get here. We can't come by bus because the doctors said exposing him to strangers and outside environment was dangerous for his health. But since we can't afford a car or van we have no other option but to take him in my rickshaw." REUTERS/Kim Kyung-Hoon SEARCH "SRI LANKA CANCER" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Anne-Marie Renaux, instrumentalist volunteer at " La Chaine de l'Espoir," a French medical association, prepares operating tools for Landry Nion's, 9, during an open-heart surgery at the General Hospital Tengandogo in Ouagadougou, Burkina Faso January 13, 2021. Picture taken January 13, 2021. REUTERS/Anne Mimault 

Landry Nion, 9, heads to the operating room during the open-heart surgery campaign by the French medical association, "La Chaine de l'Espoir", at the General Hospital Tengandogo in Ouagadougou, Burkina Faso January 13, 2021. Picture taken January 13, 2021. REUTERS/Anne Mimault 

Amandine Abilabou, 37, mother of Landry Nion, 9, prays while waiting for her son to receive his heart surgery by French medical association "La Chaine de l'Espoir", which performs a first open-heart surgery campaign at the General Hospital Tengandogo in Ouagadougou, Burkina Faso January 12 ,2021. Picture taken January 12, 2021. REUTERS/Anne Mimault 

A medical volunteer of the French medical association "La Chaine de l'Espoir" comforts Amandine Abilabou, 37, who waits for her son, Landry Nion, 9, to wake up after he received an open-heart surgery at the General Hospital Tengandogo in Ouagadougou, Burkina Faso January 14, 2021. Picture taken January 14, 2021. REUTERS/Anne Mimault 

Landry Nion, 9, waits in his hospital room to be transferred to the operating room where he will receive an open-heart surgery by the French medical association "La Chaine de l'Espoir", at the General Hospital Tengandogo in Ouagadougou, Burkina Faso January 13, 2021. Picture taken January 13, 2021. REUTERS/Anne Mimault 

Surgical volunteers of the French medical association "La Chaine de l'Espoir" and Burkina's medical staff monitor Landry Nion, 9, after performing an open-heart surgery at the General Hospital Tengandogo in Ouagadougou, Burkina Faso January 15, 2021. Picture taken January 15, 2021. REUTERS/Anne Mimault 

Surgical volunteers of the French medical association "La Chaine de l'Espoir" perform an open-heart surgery on Landry Nion, 9, at the Central Hospital Tengandogo in Ouagadougou, Burkina Faso January 13, 2021. Picture taken January 13, 2021. REUTERS/Anne Mimault 

Surgical volunteers of the French medical association "La Chaine de l'Espoir" perform an open-heart surgery on Landry Nion, 9, at the Central Hospital Tengandogo in Ouagadougou, Burkina Faso January 13, 2021. Picture taken January 13, 2021. REUTERS/Anne Mimault 

Amandine Abilabou, 37, sits beside her son, Landry Nion, 9, after he received his heart surgery by French medical association "La Chaine de l'Espoir", which performs a first open-heart surgery campaign at the General Hospital Tengandogo in Ouagadougou, Burkina Faso January 14, 2021. Picture taken January 14, 2021. REUTERS/Anne Mimault 

Isabelle Severac, nurse anesthetist volunteer of the French medical association "La Chaine de l'Espoir", monitors drugs during an open-heart surgery on Landry Nion, 9, at the Central Hospital Tengandogo in Ouagadougou, Burkina Faso January 13, 2021. Picture taken January 13, 2021. REUTERS/Anne Mimault 

Landry Nion, 9, heads to the operating room during the open-heart surgery campaign by the French medical association, "La Chaine de l'Espoir", at the General Hospital Tengandogo in Ouagadougou, Burkina Faso January 13, 2021. Picture taken January 13, 2021. REUTERS/Anne Mimault 

Burkinabe surgeon, Adama Sawadogo, trained by "La Chaine de l'Espoir", a French medical association, performs an open-heart surgery on Landry Nion, 9, at the Central Hospital Tengandogo in Ouagadougou, Burkina Faso January 13, 2021. Picture taken January 13, 2021. REUTERS/Anne Mimault 

Landry Nion, 9, is being prepared by the medical team of the French association "La Chaine de l'Espoir" for his open-heart surgery, at the General Hospital Tengandogo in Ouagadougou, Burkina Faso January 13, 2021. Picture taken January 13, 2021. REUTERS/Anne Mimault 

Landry Nion, 9, plays balloons with other hospitalised children while waiting for his open heart surgery by French medical association "La Chaine de l'Espoir", which performs a first open-heart surgery campaign at the General Hospital Tengandogo, in Ouagadougou, Burkina Faso January 12, 2021. Picture taken January 12, 2021. REUTERS/Anne Mimault 

Amandine Abilabou, 37, dresses her son Landry, 9, who is waiting to receive his heart surgery by French medical association "La Chaine de l'Espoir", which performs a first open-heart surgery campaign at the General Hospital Tengandogo, in Ouagadougou, Burkina Faso January 12, 2021. Picture taken January 12, 2021. REUTERS/Anne Mimault 

Landry Nion, 9, is seen after his heart surgery which has been done by a French medical association "La Chaine de l'Espoir" which performs a first open-heart surgery campaign at the General Hospital Tengandogo, in Ouagadougou, Burkina Faso January 14, 2021. Picture taken January 14, 2021. REUTERS/Anne Mimault 

Tanguy Abilabou, 27, rubs the foot of his nephew, Landry Nion, 9, after his open-heart surgery by the French association "La Chaine de l'Espoir" at the Central Hospital Tengandogo in Ouagadougou, Burkina Faso January 15, 2021. Picture taken January 15, 2021. REUTERS/Anne Mimault TPX IMAGES OF THE DAY 

Gerard Babatasi, a French heart surgical volunteer of the French medical association "La Chaine de l'Espoir", performs an open-heart surgery on Landry Nion, 9, at the General Hospital Tengandogo in Ouagadougou, Burkina Faso January 13, 2021. Picture taken January 13, 2021. REUTERS/Anne Mimault 

Angel Calderon, who says he had heart surgery three months ago, rests while pulling the free groceries he picked up from the PICA Olneyville Food Center amid the coronavirus disease (COVID-19) outbreak in Providence, Rhode Island, U.S., April 23, 2020. REUTERS/Brian Snyder 

Angel Calderon, who says he had heart surgery three months ago, rests while pulling the free groceries he picked up from the PICA Olneyville Food Center amid the coronavirus disease (COVID-19) outbreak in Providence, Rhode Island, U.S., April 23, 2020. REUTERS/Brian Snyder 

A healthcare worker makes the sign of a heart towards colleagues after they take a minute of silence to remember the hospital's chief of surgery who died of COVID-19 amid the coronavirus disease (COVID-19) outbreak in Madrid, Spain, April 19, 2020. REUTERS/Susana Vera 

Medical team perform a heart surgery in an operating room at the Saint-Augustin clinic in Bordeaux, France, October 25, 2018. REUTERS/Regis Duvignau TPX IMAGES OF THE DAY 

Members of a medical team are reflected in the mirror as they perform a heart surgery in an operating room at the Saint-Augustin clinic in Bordeaux, France, October 25, 2018. REUTERS/Regis Duvignau 

Medical team perform a heart surgery in an operating room at the Saint-Augustin clinic in Bordeaux, France, October 25, 2018. REUTERS/Regis Duvignau 

Medical team perform a heart surgery in an operating room at the Saint-Augustin clinic in Bordeaux, France, October 25, 2018. REUTERS/Regis Duvignau 

Medical team perform a heart surgery in an operating room at the Saint-Augustin clinic in Bordeaux, France, October 25, 2018. REUTERS/Regis Duvignau 

Medical team perform a heart surgery in an operating room at the Saint-Augustin clinic in Bordeaux, France, October 25, 2018. REUTERS/Regis Duvignau 

Medical team perform a heart surgery in an operating room at the Saint-Augustin clinic in Bordeaux, France, October 25, 2018. REUTERS/Regis Duvignau 

Medical team perform a heart surgery in an operating room at the Saint-Augustin clinic in Bordeaux, France, October 25, 2018. REUTERS/Regis Duvignau 

Medical team perform a heart surgery in an operating room at the Saint-Augustin clinic in Bordeaux, France, October 25. REUTERS/Regis Duvignau 

Medical team perform a heart surgery in an operating room at the Saint-Augustin clinic in Bordeaux, France, October 25. REUTERS/Regis Duvignau 

Medical team perform a heart surgery in an operating room at the Saint-Augustin clinic in Bordeaux, France, October 25. REUTERS/Regis Duvignau 

Medical team perform a heart surgery in an operating room at the Saint-Augustin clinic in Bordeaux, France, October 25. REUTERS/Regis Duvignau 

Medical team perform a heart surgery in an operating room at the Saint-Augustin clinic in Bordeaux, France, October 25. REUTERS/Regis Duvignau 

A child seen with an open heart surgery scar cries while holding an empty tear gas canister, which was earlier thrown by riot police, during clashes with residents of the Nile island of al-Warraq when security forces attempted to demolish illegal buildings, in the south of Cairo, Egypt July 16, 2017. REUTERS/Amr Abdallah Dalsh TPX IMAGES OF THE DAY 

A child seen with an open heart surgery scar cries while holding an empty tear gas canister, which was earlier thrown by riot police, during clashes with residents of the Nile island of al-Warraq when security forces attempted to demolish illegal buildings, in the south of Cairo, Egypt July 16, 2017. REUTERS/Amr Abdallah Dalsh 

A child seen with an open heart surgery scar cries while holding an empty tear gas canister, which was earlier thrown by riot police, during clashes with residents of the Nile island of al-Warraq when security forces attempted to demolish illegal buildings, in the south of Cairo, Egypt July 16, 2017. REUTERS/Amr Abdallah Dalsh 

REFILE - CORRECTING ANAESTHESIOLOGIST AND RESUSCITATOR'S NAMEAlexander Solodkov, an anaesthesiologist and resuscitator, and Anastasia Solodkova, a nurse anaesthetist, attend a surgery on a 20-day-old infant with congenital heart disease at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

REFILE - CORRECTING TYPO IN SURNAMEDmitry Stolyarov, a heart surgeon, looks at a monitor while he performs a surgery on a patient with a blood clot in the carotid artery at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

REFILE - CORRECTING TYPO IN SURNAMEDmitry Stolyarov, a heart surgeon, holds a stent, which is inserted into constricted coronary arteries to help keep them open and normalise blood flow, as he performs a surgery on a patient with a blood clot in the carotid artery at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

REFILE - CORRECTING TYPO IN SURNAME Dmitry Stolyarov (C), a heart surgeon, with members of a medical team perform a surgery on a patient with a blood clot in the carotid artery at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

REFILE - CORRECTING TYPO IN SURNAMEDmitry Stolyarov, a heart surgeon, with members of a medical team perform a surgery on a patient with a blood clot in the carotid artery at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

Dmitry Stolyariv, a heart surgeon, with members of a medical team perform a surgery on a patient with a blood clot in the carotid artery at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

Cardiologist Olga Steblina examines a patient after a heart surgery at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

Anastasia Solodkova, a nurse anaesthetist, attends a surgery on a 20-day-old infant with congenital heart disease at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

Dmitry Stolyariv (C), a heart surgeon, with members of a medical team perform a surgery on a patient with a blood clot in the carotid artery at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

Pavel Teplov, a pediatric heart surgeon, with a member of a medical team operate on a 20-day-old infant with congenital heart disease at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

Pavel Teplov (2nd L), a pediatric heart surgeon, with members of a medical team operate on a 20-day-old infant with congenital heart disease at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

Dmitry Gorbunov, a heart surgeon, with a member of a medical team perform a surgery to implant an artificial heart valve at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

Konstantin Ilinykh (L), an anaesthesiologist and resuscitator, with members of a medical team prepare a 20-day-old infant with congenital heart disease for surgery at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

Konstantin Ilinykh (L), an anaesthesiologist and resuscitator, with members of a medical team prepare a 20-day-old infant with congenital heart disease for surgery at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin TPX IMAGES OF THE DAY

Yevgeny Kropotkin, a heart surgeon, performs a surgery on a patient with cardiac arrhythmia at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

Konstantin Ilinykh, an anaesthesiologist and resuscitator, and Anastasia Solodkova, a nurse anaesthetist, attend a surgery on a 20-day-old infant with congenital heart disease at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

Pavel Teplov, a pediatric heart surgeon, with members of a medical team operate on a 20-day-old infant with congenital heart disease at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

Dmitry Stolyariv, a heart surgeon, holds a stent, which is inserted into constricted coronary arteries to help keep them open and normalise blood flow, as he performs a surgery on a patient with a blood clot in the carotid artery at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

Dmitry Gorbunov (R), a heart surgeon, with members of a medical team perform a surgery to implant an artificial heart valve at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

Dmitry Gorbunov, a heart surgeon, with members of a medical team perform a surgery to implant an artificial heart valve at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

Dmitry Stolyariv, a heart surgeon, looks at a monitor while he performs a surgery on a patient with a blood clot in the carotid artery at the Federal Center of Cardiovascular Surgery in the Siberian city of Krasnoyarsk, Russia, September 28, 2016. Picture taken September 28, 2016. REUTERS/Ilya Naymushin 

Monica Berckes, poses with the funeral program of her late mother Marianne Rumsey, who died at 61, several months after contracting MRSA during heart surgery, at her home in Secaucus, New Jersey, June 2, 2016. Picture taken June 2, 2016. TO MATCH SPECIAL REPORT USA-UNCOUNTED/SURVEILLANCE REUTERS/Mike Segar