A health worker carries a Yanomami woman suffering from malaria, who was removed from indigenous land, as she leaves the airplane to be treated in Boa Vista, Roraima state, Brazil, January 29, 2023. REUTERS/Amanda Perobelli 

A health worker carries a Yanomami woman suffering from malaria, who was removed from indigenous land, as she leaves the airplane to be treated in Boa Vista, Roraima state, Brazil, January 29, 2023. REUTERS/Amanda Perobelli 

A health worker carries a Yanomami woman suffering from malaria, who was removed from indigenous land, as she leaves the airplane to be treated in Boa Vista, Roraima state, Brazil, January 29, 2023. REUTERS/Amanda Perobelli 

A health worker holds a Yanomami woman suffering from malaria, who was removed from indigenous land, as she leaves the airplane to be treated in Boa Vista, Roraima state, Brazil, January 29, 2023. REUTERS/Amanda Perobelli 

A health worker helps a Yanomami man suffering from malaria, who was removed from indigenous land by airplane to be treated in Boa Vista, Roraima state, Brazil, January 29, 2023. REUTERS/Amanda Perobelli 

Naveed Ahmed, 30, a doctor, gives medical assistance to flood-affected girl Hameeda, 15, suffering from malaria at Sayed Abdullah Shah Institute of Medical Sciences in Sehwan, Pakistan September 29, 2022. REUTERS/Akhtar Soomro 

Naveed Ahmed, 30, a doctor, gives medical assistance to flood-affected woman Koonjh, 25, who is suffering from fever, at Sayed Abdullah Shah Institute of Medical Sciences in Sehwan, Pakistan September 29, 2022. REUTERS/Akhtar Soomro 

Koonjh, 25, a flood-affected woman and suffering from fever, is taken care by a relative as she waits for medical assistance at Sayed Abdullah Shah Institute of Medical Sciences in Sehwan, Pakistan September 29, 2022. REUTERS/Akhtar Soomro TPX IMAGES OF THE DAY 

Women affected by the floods sit with their children suffering from malaria and fever, as they receive medical assistance at Sayed Abdullah Shah Institute of Medical Sciences in Sehwan, Pakistan September 29, 2022. REUTERS/Akhtar Soomro 

Children affected by the floods and suffering from malaria and fever, receive medical assistance at Sayed Abdullah Shah Institute of Medical Sciences in Sehwan, Pakistan September 29, 2022. REUTERS/Akhtar Soomro 

A man charges his phone as a woman affected by the floods and suffering from malaria and fever lies on a bed and waits for medical assistance, in a corridor at Sayed Abdullah Shah Institute of Medical Sciences in Sehwan, Pakistan September 29, 2022. REUTERS/Akhtar Soomro 

A girl suffering from malaria lies down, as she takes refuge with her family in a school, following rains and floods during the monsoon season, in Karachi, Pakistan September 23, 2022. REUTERS/Akhtar Soomro 

A patient suffering from dengue fever chats with a woman while sitting under a mosquito net inside a dengue and malaria ward at the Sindh Government Services Hospital in Karachi, Pakistan September 21, 2022. REUTERS/Akhtar Soomro 

A patient suffering from dengue fever sits under a mosquito net inside a dengue and malaria ward at the Sindh Government Services Hospital in Karachi, Pakistan September 21, 2022. REUTERS/Akhtar Soomro 

Displaced and a malaria patient girl lies down, as she takes refuge with her family in a camp, following rains and floods during the monsoon season in Sehwan, Pakistan, September 16, 2022. REUTERS/Akhtar Soomro 

A nurse fills a syringe with malaria vaccine before administering it to an infant at the Lumumba Sub-County hospital in Kisumu, Kenya, July 1, 2022. REUTERS/Baz Ratner 

A nurse administers the malaria vaccine to an infant at the Lumumba Sub-County hospital in Kisumu, Kenya, July 1, 2022. REUTERS/Baz Ratner 

Rebecca Adhiamba Kwanya, 29, poses for a photo with her 18-month-old son Bradley at their home in Kisumu, Kenya, July 1, 2022. REUTERS/Baz Ratner 

A nurse fills a syringe with malaria vaccine before administering it to an infant at the Lumumba Sub-County hospital in Kisumu, Kenya, July 1, 2022. REUTERS/Baz Ratner 

A nurse administers the malaria vaccine to an infant at the Lumumba Sub-County hospital in Kisumu, Kenya, July 1, 2022. REUTERS/Baz Ratner 

A nurse holds malaria vaccine vials before administering it to an infant at the Lumumba Sub-County hospital in Kisumu, Kenya, July 1, 2022. REUTERS/Baz Ratner 

Rebecca Adhiamba Kwanya, 29, poses for a photo with her sons Betrun, 4, and 18-month-old Bradley, at their home in Kisumu, Kenya, July 1, 2022. REUTERS/Baz Ratner 

An epitaph is pictured on the gravestone of Tesfaye Weldemaryam, a Tigrayan prisoner who died after being admitted to hospital with malaria and meningitis, in Abo Orthodox Church graveyard in Addis Ababa, Ethiopia, February 21, 2022. The text reads "Tesfaye Weldemaryam was born in 1995 from his father Woldemariam Tsadik and his mother Mebrahitey Teka and died on January 12, 2022. This Epitaph is a memorial from his father and his family". Tesfaye's family said that the year on his gravestone was incorrect, and he was 36 years old. Picture taken February 21, 2022. To match Special Report ETHIOPIA-CONFLICT/PRISONERS REUTERS/Tiksa Negeri 

An epitaph is pictured on the gravestone of Tesfaye Weldemaryam, a Tigrayan prisoner who died after being admitted to hospital with malaria and meningitis, in Abo Orthodox Church graveyard in Addis Ababa, Ethiopia, February 21, 2022. The text reads "Tesfaye Weldemaryam was born in 1995 from his father Woldemariam Tsadik and his mother Mebrahitey Teka and died on January 12, 2022. This Epitaph is a memorial from his father and his family". Tesfaye's family said that the year on his gravestone was incorrect, and he was 36 years old. Picture taken February 21, 2022. To match Special Report ETHIOPIA-CONFLICT/PRISONERS REUTERS/Tiksa Negeri 

An epitaph is pictured on the gravestone of Tesfaye Weldemaryam, a Tigrayan prisoner who died after being admitted to hospital with malaria and meningitis, in Abo Orthodox Church graveyard in Addis Ababa, Ethiopia, February 21, 2022. The text reads "Tesfaye Weldemaryam was born in 1995 from his father Woldemariam Tsadik and his mother Mebrahitey Teka and died on January 12, 2022. This Epitaph is a memorial from his father and his family". Tesfaye's family said that the year on his gravestone was incorrect, and he was 36 years old. Picture taken February 21, 2022. To match Special Report ETHIOPIA-CONFLICT/PRISONERS REUTERS/Tiksa Negeri 

Kenya's President Uhuru Kenyatta attends a news conference on African Leaders Malaria Alliance (ALMA) during the 35th ordinary session of the Assembly of the African Union at the African Union Commission (AUC) headquarters in Addis Ababa, Ethiopia February 6, 2022. REUTERS/Tiksa Negeri 

Kenya's President Uhuru Kenyatta attends a news conference on African Leaders Malaria Alliance (ALMA) during the 35th ordinary session of the Assembly of the African Union at the African Union Commission (AUC) headquarters in Addis Ababa, Ethiopia, February 6, 2022. REUTERS/Tiksa Negeri 

Kenya’s President Uhuru Kenyatta attends a news conference on African Leaders Malaria Alliance (ALMA) during the 35th ordinary session of the Assembly of the African Union at the African Union Commission (AUC) headquarters in Addis Ababa, Ethiopia, February 6, 2022. REUTERS/Tiksa Negeri 

A nurse prepares to take the temperature of a child with malaria at Marcory General Hospital in Abidjan, Ivory Coast October 7, 2021. REUTERS/Luc Gnago 

A nurse prepares to take care of a child with malaria at Marcory General Hospital in Abidjan, Ivory Coast October 7, 2021. REUTERS/Luc Gnago 

A health agent prepares to take care of a child with malaria at Marcory General Hospital in Abidjan, Ivory Coast October 7, 2021. REUTERS/Luc Gnago 

A health agent gives an injection to a child with malaria at Marcory General Hospital in Abidjan, Ivory Coast October 7, 2021. REUTERS/Luc Gnago 

A health agent prepares an anti-malaria injection at Marcory General Hospital in Abidjan, Ivory Coast October 7, 2021. REUTERS/Luc Gnago 

Doctor Charles Eblin prepares to take care of a girl with malaria at his clinic Centre de sante sainte Marie de Marcory in Abidjan, Ivory Coast October 7, 2021. REUTERS/Luc Gnago 

Jeywellan Ochieng, 2, reacts after receiving the vaccine against Malaria as she is held by her mother Julliet Achieng at the Yala Sub County Hospital Mother and Child Healthcare (MCH) clinic in Gem, Siaya County, Kenya October 7, 2021. REUTERS/James Keyi 

A woman carries her child as they arrive to receive a vaccine against Malaria for infants at the Yala Sub County Hospital Mother and Child Healthcare (MCH) clinic in Gem, Siaya County, Kenya October 7, 2021. REUTERS/James Keyi 

Pamela Omboko, a nurse prepares a vaccine against Malaria for infants at the Yala Sub County Hospital Mother and Child Healthcare (MCH) clinic in Gem, Siaya County, Kenya October 7, 2021. REUTERS/James Keyi 

Pamela Omboko, a nurse administers a vaccine against Malaria for infants to Jeywellan Ochieng, 2, as she is held by her mother Julliet Achieng at the Yala Sub County Hospital Mother and Child Healthcare (MCH) clinic in Gem, Siaya County, Kenya October 7, 2021. REUTERS/James Keyi 

Pamela Omboko, a nurse prepares a vaccine against Malaria for infants at the Yala Sub County Hospital Mother and Child Healthcare (MCH) clinic in Gem, Siaya County, Kenya October 7, 2021. REUTERS/James Keyi 

CEO and co-founder of BioNTech, Ugur Sahin and European Commission President Ursula von der Leyen attend a meeting in Berlin, Germany, August 27, 2021. REUTERS/Michele Tantussi 

CEO of kENUP Foundation, Holm Keller, CEO and co-founder of BioNTech, Ugur Sahin and European Commission President Ursula von der Leyen pose for a family photo with Rwanda's President Paul Kagame and Senegal's President Macky Sall in Berlin, Germany, August 27, 2021. REUTERS/Michele Tantussi 

European Commission President Ursula von der Leyen speaks during a meeting in Berlin, Germany, August 27, 2021. REUTERS/Michele Tantussi 

European Commission President Ursula von der Leyen speaks during a meeting in Berlin, Germany, August 27, 2021. REUTERS/Michele Tantussi 

CEO and co-founder of BioNTech, Ugur Sahin attends a meeting in Berlin, Germany, August 27, 2021. REUTERS/Michele Tantussi 

CEO and co-founder of BioNTech, Ugur Sahin and European Commission President Ursula von der Leyen attend a meeting in Berlin, Germany, August 27, 2021. REUTERS/Michele Tantussi 

CEO and co-founder of BioNTech, Ugur Sahin and European Commission President Ursula von der Leyen attend a meeting in Berlin, Germany, August 27, 2021. REUTERS/Michele Tantussi 

CEO and co-founder of BioNTech, Ugur Sahin speaks next to European Commission President Ursula von der Leyen during a meeting in Berlin, Germany, August 27, 2021. REUTERS/Michele Tantussi 

CEO and co-founder of BioNTech, Ugur Sahin and European Commission President Ursula von der Leyen wear face masks during a meeting in Berlin, Germany, August 27, 2021. REUTERS/Michele Tantussi 

CEO and co-founder of BioNTech, Ugur Sahin and European Commission President Ursula von der Leyen attend a meeting in Berlin, Germany, August 27, 2021. REUTERS/Michele Tantussi 

CEO and co-founder of BioNTech, Ugur Sahin and European Commission President Ursula von der Leyen attend a meeting in Berlin, Germany, August 27, 2021. REUTERS/Michele Tantussi 

CEO and co-founder of BioNTech, Ugur Sahin and European Commission President Ursula von der Leyen bump fists during a meeting in Berlin, Germany, August 27, 2021. REUTERS/Michele Tantussi 

CEO of kENUP Foundation, Holm Keller, CEO and co-founder of BioNTech, Ugur Sahin and European Commission President Ursula von der Leyen meet with Rwanda's President Paul Kagame and Senegal's President Macky Sall in Berlin, Germany, August 27, 2021. REUTERS/Michele Tantussi 

CEO of kENUP Foundation, Holm Keller, CEO and co-founder of BioNTech, Ugur Sahin and European Commission President Ursula von der Leyen meet with Rwanda's President Paul Kagame and Senegal's President Macky Sall in Berlin, Germany, August 27, 2021. REUTERS/Michele Tantussi 

CEO of kENUP Foundation, Holm Keller, CEO and co-founder of BioNTech, Ugur Sahin and European Commission President Ursula von der Leyen meet with Rwanda's President Paul Kagame and Senegal's President Macky Sall in Berlin, Germany, August 27, 2021. REUTERS/Michele Tantussi 

Reena Jani, 34, a health worker, sits outside her home with her husband Suna Jani, 15-year-old daughter Rajani and 10-year-old son Sujeet, a day before receiving the vaccine developed by Oxford/AstraZeneca, during the coronavirus disease (COVID-19) pandemic, in Pendajam village in Koraput, India, January 15, 2021. Jani became an accredited social health activist (ASHA) community health worker, a lynchpin of India's rural healthcare system, around seven years ago. She helps to monitor pregnant women in her village of 500 people, and helps with malaria tests and doles out basic medication for fever and diarrhoea. The main breadwinner for her family of five, Jani draws a monthly salary of 3,000 rupees ($41), helping put her two daughters and one son through school. When she first learned she was to be vaccinated, Jani said she wasn't worried. Then she heard a rumour. "Someone told me that people are fainting, they are developing fever and some are dying after taking the injection," she said. "That is why I was frightened." REUTERS/Danish Siddiqui SEARCH "SIDDIQUI OXFORD/ASTRAZENECA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES 

Reena Jani, 34, a health worker, speaks to one of her patients who is pregnant, before travelling to Mathalput Community Health Centre to receive the vaccine developed by Oxford/AstraZeneca, during the coronavirus disease (COVID-19) pandemic, in Pendajam village in Koraput, India, January 16, 2021. Jani became an accredited social health activist (ASHA) community health worker, a lynchpin of India's rural healthcare system, around seven years ago. She helps to monitor pregnant women in her village of 500 people, and helps with malaria tests and doles out basic medication for fever and diarrhoea. The main breadwinner for her family of five, Jani draws a monthly salary of 3,000 rupees ($41), helping put her two daughters and one son through school. When she first learned she was to be vaccinated, Jani said she wasn't worried. Then she heard a rumour. "Someone told me that people are fainting, they are developing fever and some are dying after taking the injection," she said. "That is why I was frightened." REUTERS/Danish Siddiqui SEARCH "SIDDIQUI OXFORD/ASTRAZENECA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES 

Ramishi, 13, whose mother Reena Jani, is a health worker scheduled to receive the vaccine developed by Oxford/AstraZeneca, tries to find signal on her phone so she can ring her mother the day before Jani is vaccinated, during the coronavirus disease (COVID-19) pandemic, in Pendajam village in Koraput, India, January 15, 2021. Jani became an accredited social health activist (ASHA) community health worker, a lynchpin of India's rural healthcare system, around seven years ago. She helps to monitor pregnant women in her village of 500 people, and helps with malaria tests and doles out basic medication for fever and diarrhoea. The main breadwinner for her family of five, Jani draws a monthly salary of 3,000 rupees ($41), helping put her two daughters and one son through school. When she first learned she was to be vaccinated, Jani said she wasn't worried. Then she heard a rumour. "Someone told me that people are fainting, they are developing fever and some are dying after taking the injection," she said. "That is why I was frightened." REUTERS/Danish Siddiqui SEARCH "SIDDIQUI OXFORD/ASTRAZENECA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY. 

Reena Jani, 34, a health worker, cooks a meal before travelling to Mathalput Community Health Centre to receive the vaccine developed by Oxford/AstraZeneca, during the coronavirus disease (COVID-19) pandemic, at her home in Pendajam village in Koraput, India, January 16, 2021. Jani became an accredited social health activist (ASHA) community health worker, a lynchpin of India's rural healthcare system, around seven years ago. She helps to monitor pregnant women in her village of 500 people, and helps with malaria tests and doles out basic medication for fever and diarrhoea. The main breadwinner for her family of five, Jani draws a monthly salary of 3,000 rupees ($41), helping put her two daughters and one son through school. When she first learned she was to be vaccinated, Jani said she wasn't worried. Then she heard a rumour. "Someone told me that people are fainting, they are developing fever and some are dying after taking the injection," she said. "That is why I was frightened." REUTERS/Danish Siddiqui SEARCH "SIDDIQUI OXFORD/ASTRAZENECA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES 

Reena Jani, 34, a health worker, gets ready at her home before travelling to Mathalput Community Health Centre to receive the vaccine developed by Oxford/AstraZeneca, during the coronavirus disease (COVID-19) pandemic, in Pendajam village in Koraput, India, January 16, 2021. Jani became an accredited social health activist (ASHA) community health worker, a lynchpin of India's rural healthcare system, around seven years ago. She helps to monitor pregnant women in her village of 500 people, and helps with malaria tests and doles out basic medication for fever and diarrhoea. The main breadwinner for her family of five, Jani draws a monthly salary of 3,000 rupees ($41), helping put her two daughters and one son through school. When she first learned she was to be vaccinated, Jani said she wasn't worried. Then she heard a rumour. "Someone told me that people are fainting, they are developing fever and some are dying after taking the injection," she said. "That is why I was frightened." REUTERS/Danish Siddiqui SEARCH "SIDDIQUI OXFORD/ASTRAZENECA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY.