1. Environmental Biology for Engineers and Scientists D.A. Vaccari, P.F. Strom, and J.E. Alleman © John Wiley & Sons, 2005 Chapter 12 – Microbes and Human Health

2. Figure 12 ‑ 1. Infectious Diseases with Annual Global Mortalities of at least 100,000

3. Figure 12 ‑ 2. Robert Koch

4. Figure 12 ‑ 3. Typical pattern of water supply and wastewater disposal

5. Figure 12 ‑ 4. John Snow in 1857, one year before his death

6. Figure 12 ‑ 5. John Snow: Cholera Deaths and the Broad Street Pump

7. Figure 12 ‑ 6. Snow's Pub in London's Soho District, Adjacent to the Infamous Broad Street Pump

8. Figure 12 ‑ 7. Annual Typhoid Cases (per 100,000 residents) in New York, 1888-1938

9. Figure 12 ‑ 8. Bills of Mortality, Published by the Company of Parish Clerks in London, England - 1665