-
Point source
- An epidemic in which all cases are infected at the same time, usually from a single source or exposure. (Giesecke, pp. 135-136)
-
Continuous source
- An epidemic in which the causal agent (e.g. polluted drinking water, spoiled food) is infecting people who come into contact with it, over an extended period of time. (Giesecke, pp. 135-136)
-
Person-to-Person
(a.k.a. Propagated) - An epidemic in which the causal agent is transmitted from person to person, allowing the epidemic to propagate and spread as a function of Ro. (Giesecke, pp. 135-136)