title: Protection from microbial contamination in a room ventilated by a uni-directional air flow.
mesh_terms: D000389:Air Conditioning; D000391:Air Microbiology; D000818:Animals; D001412:Bacillus subtilis; D003428:Cross Infection / Q000517:prevention & control*; D004199:Disease Vectors; D006801:Humans; D014691:Ventilation