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A randomized double-blind study of home cleaning using antibacterial products compared to standard products did not demonstrate a difference in the incidence of respiratory symptoms including runny nose, cough or sore throat . However, antibacterial products presumably would not have an effect on viral pathogens. Despite these negative findings and despite the fact that it remains unresolved as to whether direct hand-to-hand contact or aerosol spread is the more important route of viral transmission in the community, it seems reasonable to assume that proper disposal of nasal secretions and adequate handwashing will help to prevent the spread of colds.
Larson, EL, Lin, SX, Gomez-Pichardo, C, Della-Latta, P. Effect of antibacterial home cleaning and handwashing products on infectious disease symptoms: a randomized, double-blind trial. Ann Intern Med 2004; 140:321.
RSV is highly contagious. Infection occurs commonly via aerosolized respiratory secretions and may lead to nosocomial spread. However, the virus is only stable for one hour at 37ºC, and only 10 percent of viral particles remain infective at 24 hours 
Wendt, CH, Hertz, MI. Respiratory syncytial virus infections in the immunocompromised host. Semin Respir Infect 1995; 10:224.
Saliva is not an efficient means of spread of most cold viruses. Symptomatic people with colds have no detectable virus in their saliva in 90 percent of cases . Thus, kissing is not likely to transmit the common cold.
Kirkpatrick, GL. The common cold. Prim Care 1996; 23:657.