tious agents. Disinfecting surfaces with water and detergents is apparently as effective as applying germicidal agents.
Finding 7d: The use of no-touch faucets, doorways, receptacles, and equipment seems to be a reasonable, though unproven, method for infection control.
Finding 7e: The survival, dispersal, and removal of airborne pathogens are affected by relative humidity, ventilation rate, and the percentage of recirculated air in the air supply. Increased ventilation rates have been shown to speed the dilution and removal of viral material. The use of displacement ventilation and the reduction of the percentage of recirculated air in the air supply have the potential to reduce building occupants’ exposures to airborne pathogens.
Finding 7f: Ultraviolet germicidal irradiation (UVGI) may be effective for inactivating and killing some infectious organisms, but its use in schoolroom applications has not been systematically studied.
Recommendation 7a: Future green school guidelines should include measures for the regular cleaning of commonly touched surfaces and the availability of hand sanitizers at sinks. The use of “no-touch” faucets, receptacles, equipment, and egress from bathrooms should be considered, taking into account the age of the children in the school.
Recommendation 7b: Full-scale classroom and school studies should be conducted to quantify the efficacy of a variety of ventilation strategies, including displacement ventilation and the elimination of recirculated air, for the dispersion and removal of airborne infectious agents. Studies should also quantify the potential costs and benefits of such ventilation strategies.
Recommendation 7c: Additional research should be conducted to determine the optimal infection-control interventions in terms of measurable outcomes such as absenteeism and academic achievement. One line of research is the use of ultraviolet germicidal irradiation in supplemental or portable air-cleaning devices in schoolroom applications and its effects on human health.