7 most deadly contractible diseases by approximate death toll

1. Smallpox : 300,000,000 - 5000,000,000
2. Measles : over 200,000,000
3. Bubonic Plague : 152,000,000 (approx)
4. Malaria : 80,000,000 - 250,000,000
5. Spanish Flu : 50,000,000 - 100,000,000
6. Tuberculosis : 40,000,000 - 100,000,000
7. AIDS : 25,2500,000