Epidemiology of Disease
Epidemiology of Disease
Epidemiology of Disease
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Factors Influencing <strong>Disease</strong> Transmission<br />
Agent<br />
Environment<br />
Agent-Host Factors<br />
Host<br />
Susceptibility = host vulnerable to infection<br />
• Age<br />
• Vaccination status<br />
Infected (Infectious) = host colonized and a source <strong>of</strong><br />
infection for others (may be clinically sick, or may not)<br />
Recovered = infection cleared<br />
• Pathogen threshold required to stimulate immune response<br />
• Rate <strong>of</strong> pathogen clearance by the immune system
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