Epidemiology

Question 1

5 priniciples in epidemiology:

Answer 1

Principle 1 - Source of the infectious agent is an infected (sick/carrier) organism
Principle 2 - The pathogen survives by passing from one organism to another
Principle 3 - Classified by localisation of the disease
Principle 4 - 3 factors MUST be in place for an epidemic process: presence of an infectious source, transmission mechanism, susceptibility of infection
Principle 5 - Natural and social factors (season, sanitation, housing) alter the epidemic process