Question

In a point source outbreak

Group of answer choices

all of the above can describe a point source outbreak

all individuals are exposed to the causative agent over a brief period of tim

individuals transmit the disease to others and there are rolling waves of infection

individuals are exposed to the causative agent continuously

Answer 1

Correct option is (all individuals are exposed to the causative agent over a brief period of time)

In point source outbreak, exposed period is relatively brief or short. The cases arise within one incubation period only. The cases in point source outbreak, rapidly rises and falls down gradually. There is single, rapid spurt and there is no secondary wave.

In propagated outbreak (a kind of epidemic) individuals are continuously exposed to causative agent. In point source, affected population is exposed to casuative agent at only one point of time.