Diarrhoeal Diseases

~1.5 million deaths per year. The second leading killer of children under 5, despite being almost entirely preventable with clean water, sanitation, and oral rehydration therapy (ORT). ORT costs pennies and reduces mortality by 93%. The fact that 1.5 million people still die from diarrhea in 2025 is a public health failure, not a medical one. Source: WHO.