Malaria Vaccine's Achilles' Heel: Its 4th Dose

For decades, millions of children across Africa have fallen sick from malaria, one of the continent's deadliest diseases for the young. But 9-month-old Kenfack has never had it, a feat his mother, Mabel Djoumessi, attributes to the recent arrival of a malaria vaccine, per the AP . "My other children who have never taken the vaccine frequently fall ill," Djoumessi said at Soa District Hospital. More than two years after Cameroon became the first nation to incorporate the RTS,S malaria vaccine into its routine immunization program, health workers say it's reducing severe illness. In Cameroon, one of 11 countries accounting for about 70% of the global malaria burden, per the World Health Organization, malaria remains the leading cause of hospital consultations and admissions.