What are the major health problems in Nigeria? major health problem in Nigeria. The top causes of death in Nigeria are; malaria, lower respiratory infections, HIV/AIDS, diarrheal diseases, road injuries, protein-energy malnutrition, cancer, meningitis, stroke and tuberculosis. You Are Welcome To The World Of Seed-Sourced Nutrition, Now you can discover a better, easier way to be healthy with our all-natural, super supplements. It’s time to take health by the pouch.