The control by ventilation of airborne bacterial transfer between hospital patients, and its assessment by means of a particle tracer. II. Ventilation in subdivided isolation units.

Values are deduced for the efficiency of isolation against airborne particulates, e.g. micro-organisms, of a variety of ventilation systems. The calculated values show reasonable correspondence with the limited experimental data available. Much better control and indication of the air flow is necessary if high degrees of isolation are required.