Sick Building Syndrome Definition

sĭk
noun
A condition affecting occupants of a particular building and characterized variously by headaches, fatigue, respiratory ailments, dermatitis, etc.: often attributed to bacteria or other contaminants circulated by air-conditioning systems.
Webster's New World

The adverse environmental conditions in a building that pose a health risk to its occupants.

Wiktionary

The symptoms experienced by people who work there.

Wiktionary