A mother watches her child who is suffering from an RS Virus infection at the paediatric intensive care unit at the Asklepios Clinic in Sankt Augustin, Germany, December, 6, 2022. REUTERS/Benjamin Westhoff 

Medical staff look after a child in the paediatric intensive care unit at the Asklepios Clinic in Sankt Augustin, Germany, December, 6, 2022. REUTERS/Benjamin Westhoff 

A general view shows the hand of a child with an RS Virus infection at the paediatric intensive care unit of the Asklepios Clinic in Sankt Augustin, Germany, December, 6, 2022. REUTERS/Benjamin Westhoff 

Medical staff look after a child in the paediatric intensive care unit at the Asklepios Clinic in Sankt Augustin, Germany, December, 6, 2022. REUTERS/Benjamin Westhoff 

A mother watches her child who is suffering from an RS Virus infection at the paediatric intensive care unit at the Asklepios Clinic in Sankt Augustin, Germany, December, 6, 2022. REUTERS/Benjamin Westhoff 

The medical director and head physician of paediatrics and adolescent medicine at the Asklepios Clinic in Sankt Augustin, Professor Doctor Gerd Horneff, stands in a treatment room, in Sankt Augustin, Germany, December, 6, 2022. REUTERS/Benjamin Westhoff 

A child suffering from an RS Virus infection at the paediatric intensive care unit at the Asklepios Clinic in Sankt Augustin, Germany, December, 6, 2022. REUTERS/Benjamin Westhoff 

Professor Gerd Horneff examines a child with an RS virus infection in the paediatric intensive care unit of the Asklepios Clinic in Sankt Augustin, Germany, December, 6, 2022. REUTERS/Benjamin Westhoff 

Professor Gerd Horneff examines a child with an RS virus infection in the paediatric intensive care unit of the Asklepios Clinic in Sankt Augustin, Germany, December, 6, 2022. REUTERS/Benjamin Westhoff 

Professor Gerd Horneff examines a child with an RS virus infection in the paediatric intensive care unit of the Asklepios Clinic in Sankt Augustin, Germany, December, 6, 2022. REUTERS/Benjamin Westhoff 

A child suffering from an RS Virus infection at the paediatric intensive care unit at the Asklepios Clinic in Sankt Augustin, Germany, December, 6, 2022. REUTERS/Benjamin Westhoff 

A child suffering from an RS Virus infection at the paediatric intensive care unit at the Asklepios Clinic in Sankt Augustin, Germany December, 6, 2022. REUTERS/Benjamin Westhoff 

The medical director and head physician of paediatrics and adolescent medicine at the Asklepios Clinic in Sankt Augustin, Professor Doctor Gerd Horneff, stands in a treatment room, in Sankt Augustin, Germany, December, 6, 2022. REUTERS/Benjamin Westhoff 

A mother watches her child who is suffering from an RS Virus infection at the paediatric intensive care unit at the Asklepios Clinic in Sankt Augustin, Germany, December, 6, 2022. REUTERS/Benjamin Westhoff 

A child suffering from an RS Virus infection at the paediatric intensive care unit at the Asklepios Clinic in Sankt Augustin, Germany, December, 6, 2022. REUTERS/Benjamin Westhoff 

Katarzyna Musiol, doctor of medicine and paediatric ward chief at Rybnik hospital, strokes a child patient in Rybnik, Poland October 21, 2022. REUTERS/Kuba Stezycki 

Jowita Koczwara, 36, looks at her daughter, who is a patient of the paediatric ward due to respiratory health problems, in Rybnik, Poland October 21, 2022. REUTERS/Kuba Stezycki 

Hawa Ahmed, 1, a malnourished Somali child displaced by the worsening drought in Qoryoley, Lower Shabelle due to failed rain seasons, is seen fitted with a nasogastric tube at the pediatric ward in Banadir hospital of Mogadishu, Somalia October 20, 2022. REUTERS/Feisal Omar 

Agnes Ekereku from the Turkana pastoralist community sits with her severely acute malnourished 4-year-old grandson Ekai Ebei, affected by the worsening drought due to failed rain seasons, at the paediatric stabilisation ward within the Lodwar County Referral Hospital (LCRH) in Turkana, Kenya September 26, 2022. REUTERS/Thomas Mukoya 

Sheila Ajikol, 30, carries her severely acute malnourished son Bilha Ekidor, affected by the worsening drought due to failed rain seasons, at the paediatric stabilisation ward within the Lodwar County Referral Hospital (LCRH) in Turkana, Kenya September 26, 2022. REUTERS/Thomas Mukoya 

UNICEF Regional Director Mohamed Fall visits Agnes Ekereku from the Turkana pastoralist community sitting with her severely acute malnourished 4-year-old grandson Ekai Ebei, affected by the worsening drought due to failed rain seasons, at the paediatric stabilisation ward within the Lodwar County Referral Hospital (LCRH) in Turkana, Kenya September 26, 2022. REUTERS/Thomas Mukoya 

A malnourished child affected by the worsening drought due to failed rain seasons, drinks water at the paediatric stabilisation ward within the Lodwar County Referral Hospital in Turkana, Kenya September 26, 2022. REUTERS/Thomas Mukoya 

Agnes Ekereku from the Turkana pastoralist community sits with her severely acute malnourished 4-year-old grandson Ekai Ebei, affected by the worsening drought due to failed rain seasons, at the paediatric stabilisation ward within the Lodwar County Referral Hospital (LCRH) in Turkana, Kenya September 26, 2022. REUTERS/Thomas Mukoya 

Dorcas Alongitai, 18 months old malnourished child, affected by the worsening drought due to failed rain seasons, rests at the paediatric stabilisation ward within the Lodwar County Referral Hospital in Turkana, Kenya September 26, 2022. REUTERS/Thomas Mukoya 

A woman carries her malnourished child affected by the worsening drought due to failed rain seasons, outside the paediatric stabilisation ward within the Lodwar County Referral Hospital in Turkana, Kenya September 26, 2022. REUTERS/Thomas Mukoya 

A medic attends a severely acute malnourished child affected by the worsening drought due to failed rain seasons, at the paediatric stabilisation ward within the Lodwar County Referral Hospital (LCRH) in Turkana, Kenya September 26, 2022. REUTERS/Thomas Mukoya 

Ekai Ebei, a 4-year-old severely acute malnourished child, affected by the worsening drought due to failed rain seasons, yawns at the paediatric stabilisation ward within the Lodwar County Referral Hospital in Turkana, Kenya September 26, 2022. REUTERS/Thomas Mukoya 

Fatima Ahmed, 3, a malnourished Somali child displaced by the worsening drought due to failed rain seasons, lies fitted with a nasogastric tube at the paediatric ward in the Banadir Hospital, in Mogadishu, Somalia September 24, 2022. REUTERS/Feisal Omar TPX IMAGES OF THE DAY 

Fatima Ahmed, 3, a malnourished Somali child displaced by the worsening drought due to failed rain seasons, lies fitted with a nasogastric tube, at the paediatric ward in the Banadir Hospital, in Mogadishu, Somalia September 24, 2022. REUTERS/Feisal Omar 

Jamila Omar, 3, a malnourished Somali child displaced by the worsening drought due to failed rain seasons, drinks water from a bottle as her mother Amina Mohamed looks on, at the paediatric ward in the Banadir Hospital, in Mogadishu, Somalia September 24, 2022. REUTERS/Feisal Omar 

Jamila Omar, 3, a malnourished Somali child displaced by the worsening drought due to failed rain seasons, drinks water from a bottle at the paediatric ward in the Banadir Hospital, in Mogadishu, Somalia September 24, 2022. REUTERS/Feisal Omar 

Zamzam Jamac, a Somali woman displaced by the worsening drought due to failed rain seasons, feeds her child Fatuma Botan, 1, through a nasogastric tube at the paediatric ward in the Banadir Hospital, in Mogadishu, Somalia September 24, 2022. REUTERS/Feisal Omar 

Hajira Ali, a Somali woman displaced by the worsening drought due to failed rain seasons, holds her malnourished child Farhia Hassan, 2, at the paediatric ward in the Banadir Hospital of Mogadishu, Somalia September 24, 2022. REUTERS/Feisal Omar 

Nura Ismail Ali, 4, a malnourished Somali child displaced by the worsening drought due to failed rain seasons, receives care at the paediatric ward in the Banadir Hospital, in Mogadishu, Somalia September 24, 2022. REUTERS/Feisal Omar 

Nura Ismail Ali, 4, a malnourished Somali child displaced by the worsening drought due to failed rain seasons, receives care at the paediatric ward in the Banadir Hospital, in Mogadishu, Somalia September 24, 2022. REUTERS/Feisal Omar 

A Somali medic massages Nura Ismail Ali, 4, a malnourished child displaced by the worsening drought due to failed rain seasons, at the paediatric ward in the Banadir Hospital, in Mogadishu, Somalia September 24, 2022. REUTERS/Feisal Omar 

Nura Ismail Ali, 4, a malnourished Somali child displaced by the worsening drought due to failed rain seasons, receives care at the paediatric ward at the Banadir Hospital, in Mogadishu, Somalia September 24, 2022. REUTERS/Feisal Omar 

Director of the Oxford Vaccine Group (OVG) and a professor of Paediatric Infection and Immunity Sir Andrew Pollard poses for a picture after he was made a Knight Bachelor, following an investiture ceremony at Windsor Castle, in Windsor, Britain June 8, 2022. Andrew Matthews/Pool via REUTERS 

Director of the Oxford Vaccine Group (OVG) and a professor of Paediatric Infection and Immunity Sir Andrew Pollard poses for a picture after he was made a Knight Bachelor, following an investiture ceremony at Windsor Castle, in Windsor, Britain June 8, 2022. Andrew Matthews/Pool via REUTERS 

A Somali woman holds her malnourished child inside the paediatric ward at the Baradere Hospital after fleeing from drought hit settlements near Baradere town, Gedo Region, Jubaland state, Somalia, March 13, 2022. Picture taken March 13, 2022. REUTERS/Feisal Omar 

Aden Abdulahi Abdi, 7, a malnourished child is seen inside the paediatric ward in the Baradere Hospital after fleeing from drought hit settlements near Baradere town, Gedo Region, Jubaland state, Somalia, March 13, 2022. Picture taken March 13, 2022. REUTERS/Feisal Omar 

An indigenous child named Stevon Tataendy, 8, reacts after receiving a dose of Pfizer-BioNTech coronavirus disease (COVID-19) paediatric vaccine in Sao Paulo, Brazil January 17, 2022. Picture taken January 17, 2022. REUTERS/Carla Carniel 

An indigenous child named Stevon Tataendy, 8, receives a dose of Pfizer-BioNTech coronavirus disease (COVID-19) paediatric vaccine in Sao Paulo, Brazil January 17, 2022. Picture taken January 17, 2022. REUTERS/Carla Carniel 

A child receives a dose of Pfizer-BioNTech coronavirus disease (COVID-19) paediatric vaccine in Sao Paulo, Brazil January 17, 2022. Picture taken January 17, 2022. REUTERS/Carla Carniel 

An indigenous child, Stevon Tataendy, 8, reacts before receiving a dose of Pfizer-BioNTech coronavirus disease (COVID-19) paediatric vaccine in Sao Paulo, Brazil January 17, 2022. Picture taken January 17, 2022. REUTERS/Carla Carniel 

Indigenous child Stevon Tataendy, 8, reacts after receiving a dose of the Pfizer-BioNTech coronavirus disease (COVID-19) paediatric vaccine in Sao Paulo, Brazil, January 17, 2022. REUTERS/Carla Carniel REFILE - CORRECTING YEAR 

Indigenous child Marcella Mirim, 9, receives a dose of the Pfizer-BioNTech coronavirus disease (COVID-19) paediatric vaccine in Sao Paulo, Brazil, January 17, 2022. REUTERS/Carla Carniel REFILE - CORRECTING YEAR 

Indigenous child Taylor Samuel dos Santos, 9, receives a dose of the Pfizer-BioNTech coronavirus disease (COVID-19) paediatric vaccine in Sao Paulo, Brazil, January 17, 2022. REUTERS/Carla Carniel REFILE - CORRECTING YEAR 

Indigenous child Stevon Tataendy, 8, receives a dose of the Pfizer-BioNTech coronavirus disease (COVID-19) paediatric vaccine in Sao Paulo, Brazil, January 17, 2022. REUTERS/Carla Carniel REFILE - CORRECTING YEAR 

Indigenous child Sther Poty dos Santos, 6, receives a dose of the Pfizer-BioNTech coronavirus disease (COVID-19) paediatric vaccine in Sao Paulo, Brazil, January 17, 2022. REUTERS/Carla Carniel REFILE - CORRECTING YEAR 

Indigenous child Laysa Kerexu Mirim, 7, waits to receive a dose of the Pfizer-BioNTech coronavirus disease (COVID-19) paediatric vaccine in Sao Paulo, Brazil, January 17, 2022. REUTERS/Carla Carniel REFILE - CORRECTING YEAR 

Indigenous child Laysa Kerexu Mirim, 7, receives a dose of the Pfizer-BioNTech coronavirus disease (COVID-19) paediatric vaccine in Sao Paulo, Brazil, January 17, 2022. REUTERS/Carla Carniel REFILE - CORRECTING YEAR 

Indigenous child Laysa Kerexu Mirim, 7, shows her vaccination card after receiving a dose of the Pfizer-BioNTech coronavirus disease (COVID-19) paediatric vaccine in Sao Paulo, Brazil, January 17, 2022. REUTERS/Carla Carniel REFILE - CORRECTING YEAR 

A child receives a dose of the Pfizer-BioNTech coronavirus disease (COVID-19) paediatric vaccine in Sao Paulo, Brazil, January 17, 2022. REUTERS/Carla Carniel REFILE - CORRECTING YEAR 

Indigenous child Julio Mocena, 11, receives a dose of the Pfizer-BioNTech coronavirus disease (COVID-19) paediatric vaccine in Sao Paulo, Brazil, January 17, 2022. REUTERS/Carla Carniel REFILE - CORRECTING YEAR 

A child receives a dose of Pfizer-BioNTech coronavirus disease (COVID-19) paediatric vaccine in Sao Paulo, Brazil, January 17, 2022. REUTERS/Carla Carniel REFILE - CORRECTING YEAR 

An Alpine Rescue Team member dressed as Santa Claus gives a gift to a child hospitalised in the paediatric ward of the Policlinico Umberto I Hospital, in Rome, Italy, December 23, 2021. REUTERS/Yara Nardi 

Alpine Rescue Team members dressed as Santa Claus rappel down the Policlinico Umberto I Hospital to greet children hospitalised in the paediatric ward, in Rome, Italy, December 23, 2021. REUTERS/Yara Nardi 

Alpine Rescue Team members dressed as Santa Claus rappel down the Policlinico Umberto I Hospital to greet children hospitalised in the paediatric ward, in Rome, Italy, December 23, 2021. REUTERS/Yara Nardi 

Alpine Rescue Team members dressed as Santa Claus give a gift to a child hospitalised in the paediatric ward of the Policlinico Umberto I Hospital, in Rome, Italy, December 23, 2021. REUTERS/Yara Nardi