Sickness, Illness, Infection
Puzzle 16 of Brunch Menu Easy Pack
Question is: Sickness, Illness, Infection
and the answer is: DISEASE
Word Meaning:
DISEASE — (medicine) An abnormal condition of a human, animal or plant that causes discomfort or dysfunction; distinct from injury insofar as the latter is usually instantaneously acquired.
Definitions from Wiktionary.