A(n) ____ disease has only recently been detected in humans, or has recently expanded its range.

A) emerging
B) epidemic
C) pandemic
D) sporadic
E) plague

An emerging disease is a new disease that has recently been identified in humans, or has recently expanded its range, such as the Ebola virus or Zika virus. Epidemic and pandemic refer to the spread and severity of a disease, while sporadic refers to a disease that occurs only occasionally. The term plague typically refers specifically to the infectious disease caused by the bacterium Yersinia pestis.