Indoor spread of respiratory infection by recirculation of air.

Analyses the possibility of preventing disease being spread through a school ventilating system. States that the effectiveness of disinfecting recirculated air in blocking person to person transmission of airborne infection can be predicted to be great at the beginning of a potential outbreak and negligible during an established epidemic. Also states that air disinfection would supplement immunization in the control of respiratory infection and might be cost effective.

The use of engineering controls to disinfect Mycobacterium tuberculosis and airborne pathogens in hospital buildings.

Nosocomial infectior1s are a major problem in many hospital buildings, with ,approximately 10% of patients acquiring such an infection during a hospital stay. Airborne transmission is one of the important routes for a number of nosocomial pathogens. To combat this proq,lem there are a number of engineering control strategies, such as the use of ultraviolet germicidal irradiation and advanced ventilation techniques, which can be used. This paper outlines the 'state of the art' in air disinfection, and reviews recent research work in this field.