A rapidly-spreading disease?

A rapidly-spreading disease?

A) Pandemic
B) Epidemic
C) Carcinogenic
D) Trojen

A rapidly-spreading disease = Epidemic. The correct answer would be option b epidemic.

An epidemic is the rapid spread of disease to a large number of patients among a given population within an area in a short period of time.

Epidemics of infectious diseases are generally caused by several factors including a significant change in the ecology of the areal population, the introduction of an emerging pathogen to an areal population or an unexpected genetic change that is in the pathogen reservoir.

Generally, epidemics concerns with the patterns of infectious disease spread. An epidemic may occur when host immunity to either an established pathogen or newly emerging novel pathogen is suddenly reduced below that found in the endemic equilibrium and the transmission threshold is exceeded.