Among the following forefathers of epidemiology (Semmelwise, Jenner, and Snow), pick one and describe how their actions map to at least 3 key elements of Canadas Population Health Template, listed here:

1. Focus on the health of populations
2. Address the determinants of health and their interactions
3. Base decisions on evidence
4. Increase upstream investments
5. Apply multiple strategies
6. Collaborate across sectors and levels
7. Employ mechanisms for public involvement
8. Demonstrate accountability for health outcomes