Humphrey Kizito, centre, with his brother and sister in law, stand by their parents gravesite at their home in Siaya, Kenya Saturday, April. 13, 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)