A woman receives polio drops while waiting to cross main Afghanistan-Pakistan land border crossing, in Torkham, Pakistan September 15, 2023. REUTERS/Fayaz Aziz 

A health worker administers a polio vaccine at Bundung Maternal and Child Health Hospital in Bundung, Gambia August 30, 2022. REUTERS/Edward McAllister 

The daughter of Kani Fall receives a polio vaccine at Bundung Maternal and Child Health Hospital in Bundung, Gambia August 30, 2022. REUTERS/Edward McAllister 

La poliomyélite, plus connue sous le nom de polio ou de paralysie infantile, est une infection virale systémique qui s’attaque au système nerveux et peut provoquer une paralysie irréversible dans les heures suivant l'infection. 

Map showing countries reporting cases of polio. 

Afghan men carry the coffin of one of polio vaccination health workers shot and killed by unknown gunmen at separate locations in Jalalabad, Afghanistan June 15, 2021.REUTERS/Stringer 

An Afghan man cries for his brother who was one of polio vaccination health workers shot and killed by unknown gunmen at separate locations in Jalalabad, Afghanistan June 15, 2021.REUTERS/Stringer 

An Afghan policeman stands next to empty coffins which are prepared for polio vaccination health workers who were shot and killed by unknown gunmen at separate locations in Jalalabad, Afghanistan June 15, 2021.REUTERS/Stringer 

Men pray in front of the coffin of one of three female polio vaccination health workers who were shot and killed by unknown gunmen at two separate locations in Jalalabad, Afghanistan March 30, 2021.REUTERS/Parwiz 

Men carry the coffin of one of three female polio vaccination health workers who were shot and killed by unknown gunmen at two separate locations, during a burial ceremony in Jalalabad, Afghanistan March 30, 2021. REUTERS/Parwiz 

Afghan men carry the coffin of one of the three female polio vaccination health workers who were shot and killed by unknown gunmen at two separate locations, in Jalalabad, Afghanistan, March 30, 2021. REUTERS/Parwiz 

An Afghan man cries next to the coffin of one of the three female polio vaccination health workers who were shot and killed by unknown gunmen at two separate locations, in Jalalabad, Afghanistan, March 30, 2021.REUTERS/Parwiz 

Afghan men carry the coffin of one of the three female polio vaccination health workers who were shot and killed by unknown gunmen at two separate locations, in Jalalabad, Afghanistan, March 30, 2021.REUTERS/Parwiz 

Afghan men carry the coffin of one of the three female polio vaccination health workers who were shot and killed by unknown gunmen at two separate locations, in Jalalabad, Afghanistan, March 30, 2021. REUTERS/Parwiz TPX IMAGES OF THE DAY 

Afghan men carry the coffin of one of the three female polio vaccination health workers who were shot and killed by unknown gunmen at two separate locations, in Jalalabad, Afghanistan, March 30, 2021.REUTERS/Parwiz 

A girl receives a polio vaccine during a three-day immunization campaign in Sanaa, Yemen November 29, 2020. REUTERS/Nusaibah Almuaalemi 

A girl receives a polio vaccine during a three-day immunization campaign in Sanaa, Yemen November 29, 2020. REUTERS/Nusaibah Almuaalemi TPX IMAGES OF THE DAY 

A boy receives a polio vaccine during a three-day immunization campaign in Sanaa, Yemen November 29, 2020. REUTERS/Nusaibah Almuaalemi 

A girl receives a polio vaccine during a three-day immunization campaign in Sanaa, Yemen November 29, 2020. REUTERS/Nusaibah Almuaalemi 

A girl cries as she is administered with a polio vaccine during a three-day immunization campaign in Sanaa, Yemen November 29, 2020. REUTERS/Nusaibah Almuaalemi 

A boy cries as he is administered with a polio vaccine during a three-day immunization campaign in Sanaa, Yemen November 29, 2020. REUTERS/Nusaibah Almuaalemi 

A man on crutches officiates as victims of polio disease sitting on rollers play the game of para-soccer in Abuja, Nigeria August 22, 2020. Picture taken August 22, 2020. REURERS/Afolabi Sotunde 

A victim of polio disease heads the ball during a game of para-soccer in Abuja, Nigeria August 22, 2020. Picture taken August 22, 2020. REUTERS/Afolabi Sotunde 

A victim of polio disease sits on a roller while jogging a soccer ball during a game of para-soccer in Abuja, Nigeria August 22, 2020. Picture taken August 22, 2020. REUTERS/Afolabi Sotunde 

Victims of polio disease on rollers play a game of para-soccer in Abuja, Nigeria August 22, 2020. Picture taken August 22, 2020. REUTERS/Afolabi Sotunde 

A victim of polio disease reaches for the ball on a roller during a game of para-soccer in Abuja, Nigeria August 22, 2020. Picture taken August 22, 2020. REUTERS/Afolabi Sotunde 

Misbahu Lawan Didi, the Founder and President of Para-soccer Federation of Nigeria wears a protective face mask during an interview with Reuters in Abuja, Nigeria August 21, 2020. Picture taken August 21, 2020. REUTERS/Afolabi Sotunde 

Misbahu Lawan Didi, the Founder and President of Para-soccer Federation of Nigeria wears a face shield while addressing players during a para-soccer game in Abuja, Nigeria August 22, 2020. Picture taken August 22, 2020. REUTERS/Afolabi Sotunde 

Victims of polio disease on rollers play a game of para-soccer in Abuja, Nigeria August 22, 2020. Picture taken August 22, 2020. REUTERS/Afolabi Sotunde 

A victim of polio disease sits on a goal pole during a game of para-soccer in Abuja, Nigeria August 22, 2020. Picture taken August 22, 2020. REUTERS/Afolabi Sotunde 

Gbemisola Ijigbamigbe 28, Lagos state para-swimmer who is a polio victim is seen during training in Lagos, Nigeria August 22, 2020. Picture taken August 22, 2020. REUTERS/Seun Sanni 

Vaccinators wear protective masks as they get their temperature checked, during an anti-polio campaign, in a low-income neighborhood as the spread of the coronavirus disease (COVID-19) continues, in Karachi, Pakistan July 20, 2020. REUTERS/Akhtar Soomro TPX IMAGES OF THE DAY 

Vaccinators wear protective masks as they sanitize their hands before administering polio vaccine drops, during an anti-polio campaign, in a low-income neighborhood as the spread of the coronavirus disease (COVID-19) continues, in Karachi, Pakistan July 20, 2020. REUTERS/Akhtar Soomro 

Boys wear protective masks as they head to the madrasa (religious school), during an anti-polio campaign, in a low-income neighborhood as the spread of the coronavirus disease (COVID-19) continues, in Karachi, Pakistan July 20, 2020. REUTERS/Akhtar Soomro 

A boy gets his finger marked, after he is administered polio vaccine drops, during an anti-polio campaign, in a low-income neighbourhood as the spread of the coronavirus disease (COVID-19) continues, in Karachi, Pakistan July 20, 2020. REUTERS/Akhtar Soomro 

A girl receives polio vaccine drops, during an anti-polio campaign, in a low-income neighborhood as the spread of the coronavirus disease (COVID-19) continues, in Karachi, Pakistan July 20, 2020. REUTERS/Akhtar Soomro 

A boy receives polio vaccine drops, during an anti-polio campaign, in a low-income neighborhood as the spread of the coronavirus disease (COVID-19) continues, in Karachi, Pakistan July 20, 2020. REUTERS/Akhtar Soomro 

A girl receives polio vaccine drops, during an anti-polio campaign, in a low-income neighborhood as the spread of the coronavirus disease (COVID-19) continues, in Karachi, Pakistan July 20, 2020. REUTERS/Akhtar Soomro 

A boy receives polio vaccine drops during an anti-polio campaign in Peshawar, Pakistan February 17, 2020. REUTERS/Fayaz Aziz 

A girl reacts after she was administered with polio vaccine during a house-to-house vaccination campaign in Sanaa, Yemen December 25, 2019. REUTERS/Khaled Abdullah TPX IMAGES OF THE DAY 

A child reacts as he is administered a polio vaccine during a house-to-house vaccination campaign in Sanaa, Yemen December 25, 2019. REUTERS/Khaled Abdullah 

A child is administered a polio vaccine during a house-to-house vaccination campaign in Sanaa, Yemen December 25, 2019. REUTERS/Khaled Abdullah 

MalaysiaÕs Health Minister Dzulkefly Ahmad speaks during a news conference in Putrajaya, Malaysia, December 9, 2019. REUTERS/Lim Huey Teng 

Malaysia’s Health Minister Dzulkefly Ahmad speaks during a news conference in Putrajaya, Malaysia, December 9, 2019. REUTERS/Lim Huey Teng 

MalaysiaÕs Health Minister Dzulkefly Ahmad speaks during a news conference in Putrajaya, Malaysia, December 9, 2019. REUTERS/Lim Huey Teng 

Mothers hold their children while waiting in line to receive free polio vaccine during a government-led mass vaccination program in Quezon City, Metro Manila, Philippines, October 14, 2019. REUTERS/Eloisa Lopez 

Mothers hold their children while waiting in line to receive free polio vaccine during a government-led mass vaccination program in Quezon City, Metro Manila, Philippines, October 14, 2019. REUTERS/Eloisa Lopez 

Mothers hold their children while waiting in line to receive free polio vaccine during a government-led mass vaccination program in Quezon City, Metro Manila, Philippines, October 14, 2019. REUTERS/Eloisa Lopez 

A child receives free polio vaccine during a government-led mass vaccination program in Quezon City, Metro Manila, Philippines, October 14, 2019. REUTERS/Eloisa Lopez 

A baby receives free polio vaccine during a government-led mass vaccination program in Quezon City, Metro Manila, Philippines, October 14, 2019. REUTERS/Eloisa Lopez 

A child receives free polio vaccine during a government-led mass vaccination program in Quezon City, Metro Manila, Philippines, October 14, 2019. REUTERS/Eloisa Lopez 

A child receives free polio vaccine during a government-led mass vaccination program in Quezon City, Metro Manila, Philippines, October 14, 2019. REUTERS/Eloisa Lopez 

A child receives free polio vaccine during a government-led mass vaccination program in Quezon City, Metro Manila, Philippines, October 14, 2019. REUTERS/Eloisa Lopez 

A health worker administers free polio vaccine to a child during a government-led mass vaccination program in Quezon City, Metro Manila, Philippines, October 14, 2019. REUTERS/Eloisa Lopez 

Anti-vaccination activists protest against the decision of Health Ministry and Education Ministry to not allow children without vaccination visiting kinder gardens and schools, next to Presidential Administration building in Kiev, Ukraine August 22, 2019. Picture taken August 22, 2019. REUTERS/Gleb Garanich 

Anti-vaccination activists protest against the decision of Health Ministry and Education Ministry to not allow children without vaccination visiting kinder gardens and schools, next to Presidential Administration building in Kiev, Ukraine August 22, 2019. Picture taken August 22, 2019. REUTERS/Gleb Garanich 

A boy attends a protest by anti-vaccination activists against the decision of Health Ministry and Education Ministry to not allow children without vaccination visiting kinder gardens and schools, next to Presidential Administration building in Kiev, Ukraine August 22, 2019. Picture taken August 22, 2019. The banner reads: "My baby is my responsibility". REUTERS/Gleb Garanich 

A girl receives a vaccine injection at a kids clinic in Kiev, Ukraine August 14, 2019. Picture taken August 14, 2019. REUTERS/Valentyn Ogirenko 

A boy receives a vaccine injection at a kids clinic in Kiev, Ukraine August 14, 2019. Picture taken August 14, 2019. REUTERS/Valentyn Ogirenko 

A child receives a vaccine injection at a kids clinic in Kiev, Ukraine August 14, 2019. Picture taken August 14, 2019. REUTERS/Valentyn Ogirenko