Laminar airflow hoods.
D004867:Equipment Design; D005374:Filtration / Q000295:instrumentation; D006801:Humans; D007755:Laboratories, Hospital; D007757:Laboratory Infection / Q000517:prevention & control; D016273:Occupational Exposure / Q000517:prevention & control*; D014481:United States; D014691:Ventilation / Q000295:instrumentation*