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INDIA-HEALTH-VACCINES-MALARIA-AFRICA

In this photograph taken on February 27, 2024, Adar Poonawalla, Chief Executive Officer (CEO) of Serum Institute of India (SII), speaks during an interview with AFP at the SII headquarters in Hadapsar, Pune. The world's biggest vaccine maker will start rolling out a cheap new malaria inoculation in Africa from May, bolstering the fight against one of the most deadly infectious diseases globally. The mosquito-borne malady currently kills more than 600,000 people a year, 95 percent of them in Africa, according to the World Health Organization (WHO). (Photo by Indranil MUKHERJEE / AFP) / TO GO WITH 'India-health-vaccines-malaria-Africa' FOCUS. (KEYSTONE/AFP/INDRANIL MUKHERJEE)

INDIA-HEALTH-VACCINES-MALARIA-AFRICA

In this photograph taken on February 27, 2024, Adar Poonawalla, Chief Executive Officer (CEO) of Serum Institute of India (SII), poses for pictures during an interview with AFP at the SII headquarters in Hadapsar, Pune. The world's biggest vaccine maker will start rolling out a cheap new malaria inoculation in Africa from May, bolstering the fight against one of the most deadly infectious diseases globally. The mosquito-borne malady currently kills more than 600,000 people a year, 95 percent of them in Africa, according to the World Health Organization (WHO). (Photo by Indranil MUKHERJEE / AFP) / TO GO WITH 'India-health-vaccines-malaria-Africa' FOCUS. (KEYSTONE/AFP/INDRANIL MUKHERJEE)

INDIA-HEALTH-VACCINES-MALARIA-AFRICA

In this photograph taken on February 27, 2024, staff work inside the Human Papillomavirus (HPV) vaccine manufacturing unit of the Serum Institute of India (SII) at its headquarters in Hadapsar, Pune. The world's biggest vaccine maker will start rolling out a cheap new malaria inoculation in Africa from May, bolstering the fight against one of the most deadly infectious diseases globally. The mosquito-borne malady currently kills more than 600,000 people a year, 95 percent of them in Africa, according to the World Health Organization (WHO). (Photo by Indranil MUKHERJEE / AFP) / TO GO WITH 'India-health-vaccines-malaria-Africa' FOCUS. (KEYSTONE/AFP/INDRANIL MUKHERJEE)

INDIA-HEALTH-VACCINES-MALARIA-AFRICA

In this photograph taken on February 27, 2024, a staff inspects vials of the R21 Malaria Vaccine at the Serum Institute of India (SII) headquarters in Hadapsar, Pune. The world's biggest vaccine maker will start rolling out a cheap new malaria inoculation in Africa from May, bolstering the fight against one of the most deadly infectious diseases globally. The mosquito-borne malady currently kills more than 600,000 people a year, 95 percent of them in Africa, according to the World Health Organization (WHO). (Photo by Indranil MUKHERJEE / AFP) / TO GO WITH 'India-health-vaccines-malaria-Africa' FOCUS. (KEYSTONE/AFP/INDRANIL MUKHERJEE)

PERU-HEALTH-VIRUS-DENGUE

Brigaders of the Peruvian Health Ministry inspect a mosquito at the populous district of El Agustino in Lima, on February 27, 2024. Starting Tuesday, the Peruvian government will declare a state of health emergency in 20 of its 25 regions due to a strong outbreak of dengue, the chief of staff reported last Monday. (Photo by Cris BOURONCLE / AFP) (KEYSTONE/AFP/CRIS BOURONCLE)

PERU-HEALTH-VIRUS-DENGUE

Brigaders of the Peruvian Health Ministry inspect a mosquito at the populous district of El Agustino in Lima, on February 27, 2024. Starting Tuesday, the Peruvian government will declare a state of health emergency in 20 of its 25 regions due to a strong outbreak of dengue, the chief of staff reported last Monday. (Photo by Cris BOURONCLE / AFP) (KEYSTONE/AFP/CRIS BOURONCLE)

PERU-HEALTH-VIRUS-DENGUE

A brigadier of the Peruvian Health Ministry inspects a mosquito at the populous district of El Agustino in Lima, on February 27, 2024. Starting Tuesday, the Peruvian government will declare a state of health emergency in 20 of its 25 regions due to a strong outbreak of dengue, the chief of staff reported last Monday. (Photo by Cris BOURONCLE / AFP) (KEYSTONE/AFP/CRIS BOURONCLE)

PERU-HEALTH-VIRUS-DENGUE

A brigadier of the Peruvian Ministry of Health shows an image of an Aedes aegypti mosquito at the populous district of El Agustino in Lima on February 27, 2024. Starting Tuesday, the Peruvian government will declare a state of health emergency in 20 of its 25 regions due to a strong outbreak of dengue, the chief of staff reported last Monday. (Photo by Cris BOURONCLE / AFP) (KEYSTONE/AFP/CRIS BOURONCLE)

PERU-HEALTH-VIRUS-DENGUE

A brigade of the Peruvian Ministry of Health instructs a resident of the populous district of El Agustino on how to avoid and the dangers of Dengue in Lima, on February 27, 2024. Starting Tuesday, the Peruvian government will declare a state of health emergency in 20 of its 25 regions due to a strong outbreak of dengue, the chief of staff reported last Monday. (Photo by Cris BOURONCLE / AFP) (KEYSTONE/AFP/CRIS BOURONCLE)

PERU-HEALTH-VIRUS-DENGUE

A medical technician, brigadier of a Peruvian Ministry of Health squad visiting residents at the populous district of El Agustino, inspects larvae of the Aedes aegypti mosquito during a house-to-house visit to instruct people on how to avoid and the dangers of Dengue, in Lima on February 27, 2024. Starting Tuesday, the Peruvian government will declare a state of health emergency in 20 of its 25 regions due to a strong outbreak of dengue, the chief of staff reported last Monday. (Photo by Cris BOURONCLE / AFP) (KEYSTONE/AFP/CRIS BOURONCLE)

PERU-HEALTH-VIRUS-DENGUE

A medical technician, brigadier of a Peruvian Ministry of Health squad visiting residents at the populous district of El Agustino, inspects larvae of the Aedes aegypti mosquito during a house-to-house visit to instruct people on how to avoid and the dangers of Dengue, in Lima on February 27, 2024. Starting Tuesday, the Peruvian government will declare a state of health emergency in 20 of its 25 regions due to a strong outbreak of dengue, the chief of staff reported last Monday. (Photo by Cris BOURONCLE / AFP) (KEYSTONE/AFP/CRIS BOURONCLE)

PERU-HEALTH-VIRUS-DENGUE

An aerial view of the populous district of El Agustino, where brigades of the Peruvian Ministry of Health are instructing residents on how to avoid and the dangers of Dengue, in Lima on February 27, 2024. Starting Tuesday, the Peruvian government will declare a state of health emergency in 20 of its 25 regions due to a strong outbreak of dengue, the chief of staff reported last Monday. (Photo by Cris BOURONCLE / AFP) (KEYSTONE/AFP/CRIS BOURONCLE)

PERU-HEALTH-VIRUS-DENGUE

An aerial view of the populous district of El Agustino, where brigades of the Peruvian Ministry of Health are instructing residents on how to avoid and the dangers of Dengue, in Lima on February 27, 2024. Starting Tuesday, the Peruvian government will declare a state of health emergency in 20 of its 25 regions due to a strong outbreak of dengue, the chief of staff reported last Monday. (Photo by Cris BOURONCLE / AFP) (KEYSTONE/AFP/CRIS BOURONCLE)

PERU-HEALTH-VIRUS-DENGUE

A brigadier of the Peruvian Ministry of Health instructs residents of the populous district of El Agustino on how to avoid and the dangers of Dengue, in Lima on February 27, 2024. Starting Tuesday, the Peruvian government will declare a state of health emergency in 20 of its 25 regions due to a strong outbreak of dengue, the chief of staff reported last Monday. (Photo by Cris BOURONCLE / AFP) (KEYSTONE/AFP/CRIS BOURONCLE)

PERU-HEALTH-VIRUS-DENGUE

A brigadier of the Peruvian Ministry of Health instructs residents of the populous district of El Agustino on how to avoid and the dangers of Dengue, in Lima on February 27, 2024. Starting Tuesday, the Peruvian government will declare a state of health emergency in 20 of its 25 regions due to a strong outbreak of dengue, the chief of staff reported last Monday. (Photo by Cris BOURONCLE / AFP) (KEYSTONE/AFP/CRIS BOURONCLE)

PERU-HEALTH-VIRUS-DENGUE

A brigadier of the Peruvian Ministry of Health instructs residents of the populous district of El Agustino on how to avoid and the dangers of Dengue, in Lima on February 27, 2024. Starting Tuesday, the Peruvian government will declare a state of health emergency in 20 of its 25 regions due to a strong outbreak of dengue, the chief of staff reported last Monday. (Photo by Cris BOURONCLE / AFP) (KEYSTONE/AFP/CRIS BOURONCLE)

PERU-HEALTH-VIRUS-DENGUE

Brigades of the Peruvian Ministry of Health instruct residents of the populous district of El Agustino on how to avoid and the dangers of Dengue, in Lima on February 27, 2024. Starting Tuesday, the Peruvian government will declare a state of health emergency in 20 of its 25 regions due to a strong outbreak of dengue, the chief of staff reported last Monday. (Photo by Cris BOURONCLE / AFP) (KEYSTONE/AFP/CRIS BOURONCLE)

PERU-HEALTH-VIRUS-DENGUE

A brigadier of the Peruvian Ministry of Health instructs residents of the populous district of El Agustino on how to avoid and the dangers of Dengue, in Lima on February 27, 2024. Starting Tuesday, the Peruvian government will declare a state of health emergency in 20 of its 25 regions due to a strong outbreak of dengue, the chief of staff reported last Monday. (Photo by Cris BOURONCLE / AFP) (KEYSTONE/AFP/CRIS BOURONCLE)

PERU-HEALTH-VIRUS-DENGUE

Brigadiers of the Peruvian Ministry of Health receive instructions before visiting residents of the populous district of El Agustino to instruct on the ways to avoid and the dangers of Dengue disease, in Lima on February 27, 2024. Starting Tuesday, the Peruvian government will declare a state of health emergency in 20 of its 25 regions due to a strong outbreak of dengue, the chief of staff reported last Monday. (Photo by Cris BOURONCLE / AFP) (KEYSTONE/AFP/CRIS BOURONCLE)

RESPIRATORY SYNCYTIAL VIRUS, SEM

Respiratory Syncytial Virus A (RSV A). Scanning electron micrograph (SEM) of a HEp2/HeLa cell (Human epithelial cell) infected with RSV A (Strain Long) showing long filamentous enveloped particles emerging from the plasma membrane. Respiratory syncytial virus is a common respiratory virus that usually causes mild, cold-like symptoms. Most people recover in a week or two, but RSV can be serious. Infants and older adults are more likely to develop bronchiolitis and pneumonia requiring hospitalization. Magnification: x3200 when printed 10 centimetres wide. Specimen courtesy of Virology Research Services Ltd (Scott Lawrence). (KEYSTONE/SCIENCE PHOTO LIBRARY/STEVE GSCHMEISSNER)

RESPIRATORY SYNCYTIAL VIRUS, SEM

Respiratory Syncytial Virus A (RSV A). Scanning electron micrograph (SEM) of a HEp2/HeLa cell (Human epithelial cell) infected with RSV A (Strain Long) showing long filamentous enveloped particles emerging from the plasma membrane. Respiratory syncytial virus is a common respiratory virus that usually causes mild, cold-like symptoms. Most people recover in a week or two, but RSV can be serious. Infants and older adults are more likely to develop bronchiolitis and pneumonia requiring hospitalization. Magnification: x3200 when printed 10 centimetres wide. Specimen courtesy of Virology Research Services Ltd (Scott Lawrence). (KEYSTONE/SCIENCE PHOTO LIBRARY/STEVE GSCHMEISSNER)

RESPIRATORY SYNCYTIAL VIRUS, SEM

Respiratory Syncytial Virus A (RSV A). Scanning electron micrograph (SEM) of a HEp2/HeLa cell (Human epithelial cell) infected with RSV A (Strain Long) showing long filamentous enveloped particles emerging from the plasma membrane. Respiratory syncytial virus is a common respiratory virus that usually causes mild, cold-like symptoms. Most people recover in a week or two, but RSV can be serious. Infants and older adults are more likely to develop bronchiolitis and pneumonia requiring hospitalization. Magnification: x3200 when printed 10 centimetres wide. Specimen courtesy of Virology Research Services Ltd (Scott Lawrence). (KEYSTONE/SCIENCE PHOTO LIBRARY/STEVE GSCHMEISSNER)

RESPIRATORY SYNCYTIAL VIRUS, ILLUSTRATION

Illustration of respiratory syncytial virus (RSV) particles. RSV causes infections in the lungs and respiratory tract. It is very common in children, but it can also affect adults. The symptoms are usually mild, self-resolving and resemble those of the common cold. (KEYSTONE/SCIENCE PHOTO LIBRARY/NIAID)

MPOX VIRUS PARTICLES, TEM

Coloured transmission electron micrograph (TEM) of mpox (previously monkeypox) virus particles (red) within an infected cell (blue). In humans mpox infection causes fever, fatigue, body aches, swollen glands and a rash of fluid-filled blisters. Transmission can occur through direct contact with infectious skin or other lesions, bites or scratches from infected animals, or indirectly through contact with contaminated objects. The mpox virus was first discovered in 1958 in two outbreaks of a pox-like disease among colonies of research monkeys, though small mammals such as rodents are believed to be the natural hosts. The first human case was recorded in 1970 in the Democratic Republic of the Congo, and it is endemic in central and western Africa. Most people recover from mpox infection within 2-4 weeks, and a vaccine is available. (KEYSTONE/SCIENCE PHOTO LIBRARY/NIAID)

MPOX VIRUS PARTICLES, TEM

Coloured transmission electron micrograph (TEM) of mpox (previously monkeypox) virus particles (orange) within an infected cell (yellow). In humans mpox infection causes fever, fatigue, body aches, swollen glands and a rash of fluid-filled blisters. Transmission can occur through direct contact with infectious skin or other lesions, bites or scratches from infected animals, or indirectly through contact with contaminated objects. The mpox virus was first discovered in 1958 in two outbreaks of a pox-like disease among colonies of research monkeys, though small mammals such as rodents are believed to be the natural hosts. The first human case was recorded in 1970 in the Democratic Republic of the Congo, and it is endemic in central and western Africa. Most people recover from mpox infection within 2-4 weeks, and a vaccine is available. (KEYSTONE/SCIENCE PHOTO LIBRARY/NIAID)

RESPIRATORY SYNCYTIAL VIRUS, ILLUSTRATION

Illustration of respiratory syncytial virus (RSV) particles. RSV causes infections in the lungs and respiratory tract. It is very common in children, but it can also affect adults. The symptoms are usually mild, self-resolving and resemble those of the common cold. (KEYSTONE/SCIENCE PHOTO LIBRARY/NATIONAL INSTITUTES OF HEALTH, NIAID)

RESPIRATORY SYNCYTIAL VIRUS, ILLUSTRATION

Illustration of respiratory syncytial virus (RSV) particles. RSV causes infections in the lungs and respiratory tract. It is very common in children, but it can also affect adults. The symptoms are usually mild, self-resolving and resemble those of the common cold. (KEYSTONE/SCIENCE PHOTO LIBRARY/NATIONAL INSTITUTES OF HEALTH)

MPOX VIRUS PARTICLES, TEM

Coloured transmission electron micrograph (TEM) of mpox (previously monkeypox) virus particles (blue) within an infected cell (pink). In humans mpox infection causes fever, fatigue, body aches, swollen glands and a rash of fluid-filled blisters. Transmission can occur through direct contact with infectious skin or other lesions, bites or scratches from infected animals, or indirectly through contact with contaminated objects. The mpox virus was first discovered in 1958 in two outbreaks of a pox-like disease among colonies of research monkeys, though small mammals such as rodents are believed to be the natural hosts. The first human case was recorded in 1970 in the Democratic Republic of the Congo, and it is endemic in central and western Africa. Most people recover from mpox infection within 2-4 weeks, and a vaccine is available. (KEYSTONE/SCIENCE PHOTO LIBRARY/NIAID)

HIV-1 VIRUS PARTICLES, TEM

Coloured transmission electron micrograph (TEM) of HIV-1 virus particles (orange) budding from the membrane of a T-cell white blood cell (green). Budding virus particles that have not yet separated from the cell appear as semi-circles. HIV (human immunodeficiency virus) infects helper T-cells, which are part of the body's immune system. HIV enters the cell and replicates, before destroying the cell as the new viruses emerge through its membrane. Eventually this severely weakens the immune system, causing AIDS (acquired immunodeficiency syndrome). (KEYSTONE/SCIENCE PHOTO LIBRARY/NATIONAL INSTITUTES OF HEALTHNIAID)

HIV-1 VIRUS PARTICLES, TEM

Coloured transmission electron micrograph (TEM) of HIV-1 virus particles (yellow/gold) budding from the membrane of a T-cell white blood cell (blue). Budding virus particles that have not yet separated from the cell appear as semi-circles. HIV (human immunodeficiency virus) infects helper T-cells, which are part of the body's immune system. HIV enters the cell and replicates, before destroying the cell as the new viruses emerge through its membrane. Eventually this severely weakens the immune system, causing AIDS (acquired immunodeficiency syndrome). (KEYSTONE/SCIENCE PHOTO LIBRARY/NATIONAL INSTITUTES OF HEALTH, NIAID)

HIV-1 VIRUS PARTICLES, TEM

Coloured transmission electron micrograph (TEM) of HIV-1 virus particles (red) budding from the membrane of a T-cell white blood cell (blue). Budding virus particles that have not yet separated from the cell appear as semi-circles. HIV (human immunodeficiency virus) infects helper T-cells, which are part of the body's immune system. HIV enters the cell and replicates, before destroying the cell as the new viruses emerge through its membrane. Eventually this severely weakens the immune system, causing AIDS (acquired immunodeficiency syndrome). (KEYSTONE/SCIENCE PHOTO LIBRARY/NATIONAL INSTITUTES OF HEALTH, NIAID)

HEPATITIS B VIRUS, ILLUSTRATION

Illustration of hepatitis B virus (HBV) particles. HBV causes the disease hepatitis B (hep B), which affects the liver. Hep B can cause acute symptoms lasting several weeks, from which most recover naturally, but chronic hep B can cause cirrhosis and liver cancer to develop over many years. There is no cure for chronic hep B, but vaccines exist which are offer near 100 percent protection from infection. (KEYSTONE/SCIENCE PHOTO LIBRARY/NATIONAL INSTITUTES OF HEALTH, NATIONAL INSTITUTES OF HEALTH)

HEPATITIS B VIRUS, ILLUSTRATION

Illustration of hepatitis B virus (HBV) particles. HBV causes the disease hepatitis B (hep B), which affects the liver. Hep B can cause acute symptoms lasting several weeks, from which most recover naturally, but chronic hep B can cause cirrhosis and liver cancer to develop over many years. There is no cure for chronic hep B, but vaccines exist which offer near 100 percent protection from infection. (KEYSTONE/SCIENCE PHOTO LIBRARY/NATIONAL INSTITUTES OF HEALTH, NIAID)

HEPATITIS B VIRUS, ILLUSTRATION

Illustration of a hepatitis B virus (HBV) particle. HBV causes the disease hepatitis B (hep b), which affects the liver. Hep B can cause acute symptoms lasting several weeks, from which most recover naturally, but chronic hep B can cause cirrhosis and liver cancer to develop over many years. There is no cure for chronic hep B, but vaccines exist which offer near 100 percent protection from infection. (KEYSTONE/SCIENCE PHOTO LIBRARY/NATIONAL INSTITUTES OF HEALTH, NIAID)

TOPSHOT-BRAZIL-HEALTH-VIRUS-DENGUE-FUMIGATION

TOPSHOT - A health worker fumigates against the Aedes aegypti mosquito, a vector of the dengue, Zika, and Chikungunya viruses in Contagem, metropolitan region of Belo Horizonte, state of Minas Gerais, Brazil, on February 2, 2024, as the country faces a substantial increase in dengue fever cases. Brazil will begin a dengue immunization campaign in February following a surge in cases that has put the government on alert, officials said. (Photo by DOUGLAS MAGNO / AFP) (KEYSTONE/AFP/DOUGLAS MAGNO)

BRAZIL-HEALTH-VIRUS-DENGUE

A dose of the Qdenga vaccine is pictured in a private laboratory in Belo Horizonte, state of Minas Gerais, Brazil, on February 2, 2024. Brazil will begin a dengue immunization campaign in February following a surge in cases that has put the government on alert, officials said. (Photo by DOUGLAS MAGNO / AFP) (KEYSTONE/AFP/DOUGLAS MAGNO)

BRAZIL-HEALTH-VIRUS-DENGUE

A dose of the Qdenga vaccine is pictured in a private laboratory in Belo Horizonte, state of Minas Gerais, Brazil, on February 2, 2024. Brazil will begin a dengue immunization campaign in February following a surge in cases that has put the government on alert, officials said. (Photo by DOUGLAS MAGNO / AFP) (KEYSTONE/AFP/DOUGLAS MAGNO)

BRAZIL-HEALTH-VIRUS-DENGUE

A dose of the Qdenga vaccine is pictured in a private laboratory in Belo Horizonte, state of Minas Gerais, Brazil, on February 2, 2024. Brazil will begin a dengue immunization campaign in February following a surge in cases that has put the government on alert, officials said. (Photo by DOUGLAS MAGNO / AFP) (KEYSTONE/AFP/DOUGLAS MAGNO)

BRAZIL-HEALTH-VIRUS-DENGUE-FUMIGATION

A health worker fumigates against the Aedes aegypti mosquito, a vector of the dengue, Zika, and Chikungunya viruses in Contagem, metropolitan region of Belo Horizonte, state of Minas Gerais, Brazil, on February 2, 2024, as the country faces a substantial increase in dengue fever cases. (Photo by DOUGLAS MAGNO / AFP) (KEYSTONE/AFP/DOUGLAS MAGNO)

BRAZIL-HEALTH-VIRUS-DENGUE-FUMIGATION

A health worker fumigates against the Aedes aegypti mosquito, a vector of the dengue, Zika, and Chikungunya viruses in Contagem, metropolitan region of Belo Horizonte, state of Minas Gerais, Brazil, on February 2, 2024, as the country faces a substantial increase in dengue fever cases. (Photo by DOUGLAS MAGNO / AFP) (KEYSTONE/AFP/DOUGLAS MAGNO)

BRAZIL-HEALTH-VIRUS-DENGUE-FUMIGATION

A health worker fumigates against the Aedes aegypti mosquito, a vector of the dengue, Zika, and Chikungunya viruses in Contagem, metropolitan region of Belo Horizonte, state of Minas Gerais, Brazil, on February 2, 2024, as the country faces a substantial increase in dengue fever cases. (Photo by DOUGLAS MAGNO / AFP) (KEYSTONE/AFP/DOUGLAS MAGNO)

BRAZIL-HEALTH-VIRUS-DENGUE-FUMIGATION

A health worker fumigates against the Aedes aegypti mosquito, a vector of the dengue, Zika, and Chikungunya viruses in Contagem, metropolitan region of Belo Horizonte, state of Minas Gerais, Brazil, on February 2, 2024, as the country faces a substantial increase in dengue fever cases. (Photo by DOUGLAS MAGNO / AFP) (KEYSTONE/AFP/DOUGLAS MAGNO)

BRAZIL-HEALTH-VIRUS-DENGUE-FUMIGATION

A health worker fumigates against the Aedes aegypti mosquito, a vector of the dengue, Zika, and Chikungunya viruses in Contagem, metropolitan region of Belo Horizonte, state of Minas Gerais, Brazil, on February 2, 2024, as the country faces a substantial increase in dengue fever cases. (Photo by DOUGLAS MAGNO / AFP) (KEYSTONE/AFP/DOUGLAS MAGNO)

BRAZIL-HEALTH-VIRUS-DENGUE-FUMIGATION

A health worker fumigates against the Aedes aegypti mosquito, a vector of the dengue, Zika, and Chikungunya viruses in Contagem, metropolitan region of Belo Horizonte, state of Minas Gerais, Brazil, on February 2, 2024, as the country faces a substantial increase in dengue fever cases. (Photo by DOUGLAS MAGNO / AFP) (KEYSTONE/AFP/DOUGLAS MAGNO)

BRAZIL-HEALTH-VIRUS-DENGUE-FUMIGATION

Health workers fumigate against the Aedes aegypti mosquito, a vector of the dengue, Zika, and Chikungunya viruses in Contagem, metropolitan region of Belo Horizonte, state of Minas Gerais, Brazil, on February 2, 2024, as the country faces a substantial increase in dengue fever cases. (Photo by DOUGLAS MAGNO / AFP) (KEYSTONE/AFP/DOUGLAS MAGNO)

BRAZIL-HEALTH-VIRUS-DENGUE-FUMIGATION

A health worker fumigates against the Aedes aegypti mosquito, a vector of the dengue, Zika, and Chikungunya viruses in Contagem, metropolitan region of Belo Horizonte, state of Minas Gerais, Brazil, on February 2, 2024, as the country faces a substantial increase in dengue fever cases. (Photo by DOUGLAS MAGNO / AFP) (KEYSTONE/AFP/DOUGLAS MAGNO)

BRAZIL-HEALTH-VIRUS-DENGUE-FUMIGATION

A health worker fumigates against the Aedes aegypti mosquito, a vector of the dengue, Zika, and Chikungunya viruses in Contagem, metropolitan region of Belo Horizonte, state of Minas Gerais, Brazil, on February 2, 2024, as the country faces a substantial increase in dengue fever cases. (Photo by DOUGLAS MAGNO / AFP) (KEYSTONE/AFP/DOUGLAS MAGNO)

BRAZIL-HEALTH-VIRUS-DENGUE-FUMIGATION

A health worker fumigates against the Aedes aegypti mosquito, a vector of the dengue, Zika, and Chikungunya viruses in Contagem, metropolitan region of Belo Horizonte, state of Minas Gerais, Brazil, on February 2, 2024, as the country faces a substantial increase in dengue fever cases. (Photo by DOUGLAS MAGNO / AFP) (KEYSTONE/AFP/DOUGLAS MAGNO)

BRAZIL-HEALTH-VIRUS-DENGUE-FUMIGATION

A health worker fumigates against the Aedes aegypti mosquito, a vector of the dengue, Zika, and Chikungunya viruses in Contagem, metropolitan region of Belo Horizonte, state of Minas Gerais, Brazil, on February 2, 2024, as the country faces a substantial increase in dengue fever cases. (Photo by DOUGLAS MAGNO / AFP) (KEYSTONE/AFP/DOUGLAS MAGNO)

BRAZIL-HEALTH-VIRUS-DENGUE-FUMIGATION

A health worker fumigates against the Aedes aegypti mosquito, a vector of the dengue, Zika, and Chikungunya viruses in Contagem, metropolitan region of Belo Horizonte, state of Minas Gerais, Brazil, on February 2, 2024, as the country faces a substantial increase in dengue fever cases. (Photo by DOUGLAS MAGNO / AFP) (KEYSTONE/AFP/DOUGLAS MAGNO)

BRAZIL-HEALTH-VIRUS-DENGUE-FUMIGATION

A health worker fumigates against the Aedes aegypti mosquito, a vector of the dengue, Zika, and Chikungunya viruses in Contagem, metropolitan region of Belo Horizonte, state of Minas Gerais, Brazil, on February 2, 2024, as the country faces a substantial increase in dengue fever cases. (Photo by DOUGLAS MAGNO / AFP) (KEYSTONE/AFP/DOUGLAS MAGNO)

BRAZIL-HEALTH-VIRUS-DENGUE-FUMIGATION

Health workers fumigate against the Aedes aegypti mosquito, a vector of the dengue, Zika, and Chikungunya viruses in Contagem, metropolitan region of Belo Horizonte, state of Minas Gerais, Brazil, on February 2, 2024, as the country faces a substantial increase in dengue fever cases. (Photo by DOUGLAS MAGNO / AFP) (KEYSTONE/AFP/DOUGLAS MAGNO)

POX VIRUS PARTICLE, ILLUSTRATION

This image may not be used in educational posters .Illustration of a pox virus particle. The outer coat is transparent, allowing the dumbbell-shaped core to be seen. Pox viruses include smallpox and monkeypox, which cause similar symptoms, although monkeypox is a milder disease. Symptoms include fever and a rash, which turns into thousands of small blisters filled with virus-containing fluid. Smallpox was a lethal disease that was eradicated in 1980. Monkeypox is endemic to Central and West Africa, although outbreaks have occurred around the world, including the 2022 outbreak in the UK, Europe and the Americas. (KEYSTONE/SCIENCE PHOTO LIBRARY/RUSSELL KIGHTLEY)

HUMAN PAPILLOMA VIRUS PARTICLE, ILLUSTRATION

This image may not be used in educational posters .Human papilloma virus (HPV) particle, illustration. HPV particles (virions) consist of a protein capsid enclosing DNA (deoxyribonucleic acid), the genetic material of the virus. Attached to the capsid are many surface proteins (blobs). HPV causes warts, which mostly occur on the hands and feet. Certain strains also infect the genitals. Although most warts are non-malignant (not cancerous), some strains of HPV have been associated with cancers, especially cervical cancer. (KEYSTONE/SCIENCE PHOTO LIBRARY/RUSSELL KIGHTLEY)

ADENO-ASSOCIATED VIRUS PARTICLE, ILLUSTRATION

This image may not be used in educational posters .Illustration of an adeno-associated virus (AAV) particle. AAVs are small, non-enveloped viruses. They are considered non-pathogenic, meaning they do not cause any known diseases in humans. AAVs have been studied extensively for their potential use in gene therapy, a medical technique that involves introducing new genes into a patient's cells to treat or prevent diseases. (KEYSTONE/SCIENCE PHOTO LIBRARY/RUSSELL KIGHTLEY)

INFLUENZA VIRUS PARTICLES, ILLUSTRATION

This image may not be used in educational posters .Illustration of influenza (flu) virus particles. Flu viruses are covered by spikes of haemagglutinin (H, slender knob-like projections) and neuraminidase (N, square-like projections). Flu viruses have a segemented genome which can get jumbled up during replication (gene mixing). This allows different strains to form easily from existing types. (KEYSTONE/SCIENCE PHOTO LIBRARY/RUSSELL KIGHTLEY)

YOUNG SCIENTIST ANALYZING VIRUS PARTICLES THROUGH ELECTRON MICROGRAPH ON COMPUTER

Young scientist analyzing virus particles through electron micrograph on computer (KEYSTONE/WESTEND61/ANDREW BROOKES)

SCIENTIST EXAMINING VIRUS PARTICLES THROUGH ELECTRON MICROGRAPH ON COMPUTER

Scientist examining virus particles through electron micrograph on computer (KEYSTONE/WESTEND61/ANDREW BROOKES)

THE CENTRE RING ROAD NEAR THE OLYMPIC STADIUM IN MUNICH IS COMPLETELY EMPTY, CAR-FREE SUNDAY, BAVARIA, GERMANY

the centre ring road near the Olympic stadium in Munich is completely empty, car-free Sunday, Bavaria, Germany (KEYSTONE/mauritius images/DIRK VON MALLINCKRODT)

PARAGUAY-HEALTH-DENGUE-PREVENTION

People wait to be attended at a hospital in Asuncion on January 9, 2024, as the government carries out an eradication campaign against the Aedes aegypti mosquito, which spreads the dengue-causing virus. Hospitals in Asuncion are receiving many patients with dengue symptoms. The mosquito-borne disease, endemic to tropical areas, causes high fevers, headaches, nausea, vomiting, muscle pain and, in the most serious cases, bleeding that can lead to death. (Photo by Norberto DUARTE / AFP) (KEYSTONE/AFP/NORBERTO DUARTE)

PARAGUAY-HEALTH-DENGUE-PREVENTION

A municipal worker collects scattered garbage in a poor neighbourhood in Asuncion on January 9, 2024, as part of an eradication campaign against the Aedes aegypti mosquito, which spreads the dengue-causing virus. Hospitals in Asuncion are receiving many patients with dengue symptoms. The mosquito-borne disease, endemic to tropical areas, causes high fevers, headaches, nausea, vomiting, muscle pain and, in the most serious cases, bleeding that can lead to death. (Photo by Norberto DUARTE / AFP) (KEYSTONE/AFP/NORBERTO DUARTE)

PARAGUAY-HEALTH-DENGUE-PREVENTION

Municipal workers collect scattered garbage and cut grass in a poor neighbourhood in Asuncion on January 9, 2024, as part of an eradication campaign against the Aedes aegypti mosquito, which spreads the dengue-causing virus. Hospitals in Asuncion are receiving many patients with dengue symptoms. The mosquito-borne disease, endemic to tropical areas, causes high fevers, headaches, nausea, vomiting, muscle pain and, in the most serious cases, bleeding that can lead to death. (Photo by Norberto DUARTE / AFP) (KEYSTONE/AFP/NORBERTO DUARTE)

PARAGUAY-HEALTH-DENGUE-PREVENTION

Municipal workers cut grass in a poor neighbourhood in Asuncion on January 9, 2024, as part of an eradication campaign against the Aedes aegypti mosquito, which spreads the dengue-causing virus. Hospitals in Asuncion are receiving many patients with dengue symptoms. The mosquito-borne disease, endemic to tropical areas, causes high fevers, headaches, nausea, vomiting, muscle pain and, in the most serious cases, bleeding that can lead to death. (Photo by Norberto DUARTE / AFP) (KEYSTONE/AFP/NORBERTO DUARTE)

PARAGUAY-HEALTH-DENGUE-PREVENTION

Municipal workers cut grass in a poor neighbourhood in Asuncion on January 9, 2024, as part of an eradication campaign against the Aedes aegypti mosquito, which spreads the dengue-causing virus. Hospitals in Asuncion are receiving many patients with dengue symptoms. The mosquito-borne disease, endemic to tropical areas, causes high fevers, headaches, nausea, vomiting, muscle pain and, in the most serious cases, bleeding that can lead to death. (Photo by Norberto DUARTE / AFP) (KEYSTONE/AFP/NORBERTO DUARTE)