罹患率(発病率)（attack rate）

意味

Proportion of people that contract a disease in a population initially free of the disease, i.e. during a disease outbreak. It is used in hypothetical predictions and during actual outbreaks of disease. An at-risk population is defined as one that has no immunity to the attacking pathogen, which can be either a novel pathogen or an established pathogen. It is used to project the number of infections to expect during an epidemic.