Also, epidemical. (of a disease) affecting many persons at the same time, and spreading from person to person in a locality where the disease is not permanently prevalent.

extremely prevalent; widespread.

a temporary prevalence of a disease.

a rapid spread or increase in the occurrence of something

an epidemic of riots.

adjective

limited

adjective

catching , communicable , contagious , endemic , general , infectious , pandemic , prevailing , prevalent , rampant , rife , sweeping , [[wide-rangingnotes:an endemic is a disease that is constantly present to a greater or lesser degree in people of a certain class or in people living in a particular location; an epidemic is a widespread outbreak of an infectious disease that infects many people at the same time; a pandemic is an epidemic that is geographically widespread occurring throughout a region or even throughout the world]]

noun

contagion , endemic , growth , outbreak , pest , pestilence , plague , rash , scourge , spread , upsurge , wave , [[what’s going aroundnotes:an endemic is a disease that is constantly present to a greater or lesser degree in people of a certain class or in people living in a particular location; an epidemic is a widespread outbreak of an infectious disease that infects many people at the same time; a pandemic is an epidemic that is geographically widespread occurring throughout a region or even throughout the world]] , catching , communicable , contagious , infectious , widespread