1. Epidemic (Compartment) Models

2. Epidemic without Removal SI Process Only Transition: Infection Transmission SIS Process Two Transitions: Infection and Recovery without Immunity

3. Epidemic with Removal SIR Epidemic Two Transitions: Infection and Removal SIRS Epidemic Three Transitions: Infection, Removal with Immunity, Loss of Immunity

4. Infection Dynamics Epidemic: Pathogen Advances from Rarity; Infects Detectable Number of Hosts Endemic: Dynamic Equilibrium; Constant Positive Density of Infectious Hosts Disease-Free Equilibrium: No Infected Hosts AND No Free-Living Pathogens

5. Infection Dynamics

6. SIR Epidemic; Fixed Population Size

7. SIR Epidemic: Pathogen Invasion

8. Rate of New Infection  S 0 Infections/Time Duration of Infectious Period 1/  Time (Infections/Time) Time = New Infections

9. SIR Epidemic: Pathogen Invasion