A nurse administers an injection to a malaria patient in a ward at Nightingale Medical Centre, in Kisumu, Kenya Tuesday, April. 16, 2024. Even after parts of Kenya participated in an important pilot of the world's first malaria vaccine, with a reported drop in deaths for children under 5, the disease is still a significant public health challenge. Kenya's health ministry hasn't said when the vaccine will be widely available. (AP Photo/Brian Ongoro)