A Definition Of Plague
Source: Adapted from the National Institutes of Health

What does the term “plague” mean? The term “plague” refers to 1. any contagious epidemic disease that is deadly. 2. an infectious disease caused by yersinia pestis that can be spread from animals to humans and is normally spread to humans by fleas (called To find out more about this term, please search the news section of this website for related articles and information.