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Posted By Swis
Dave – your references
1)
Bean B, Moore BM, Sterner B, Peterson LR, Gerding DN, Balfour HH, Jr. Survival of influenza viruses on environmental surfaces. J Infect Dis 1982; 146:47-51.
The study concluded that the virus survived on hands for up to 5 min after transfer from the environmental surfaces. Now how a virus could can transmit a disease from hands if it is not being able to live for 5 mins. And how practical would it be to wash hands every couple of minutes at work place.?
2)
Nicas M and Best D. A study quantifying the hand-to-face contact rate and its potential application to predicting respiratory tract infection. J Occup Environ Hyg 2008; 5:347-352.
The number of hand contacts to the eyes, nostrils, and lips was scored during study… nothing to do with virus transmission.
3)
Winther B, McCue K, Ashe K, Rubino JR, Hendley JO. Environmental contamination with rhinovirus and transfer to fingers of healthy individuals by daily life activity. J Med Virol 2007; 79:1606-1610.
The study states that virus on surfaces can be transferred to a fingertip during normal daily activities but it states nothing with the transmission of viral infection. (no-one’s arguing the fact that contamination of hands is possible.) however, transmission of disease is highly unlikely.
4)
Ansari SA, Springthorpe S, Sattar S, Rivard S, Rahman M. Potential role of hands in the spread of respiratory viral infections: studies with human Parainfluenza virus 3 and rhinovirus 14. J Clin Microbiol 1991; 29:2115-2119.
The study states that the relatively rapid loss of viral infectivity on hands suggests that their role in the direct spread of influenza viruses is limited. Further more, relative importance of air , hands, and environmental surfaces in the spread of rhinovirus colds has been studied, but quantitative studies have not been carried out.
http://jcm.asm.org/cgi/content/abstract/29/10/2115
Ian – your reference
Cochrane Database Syst Rev. 2007 Oct 17;(4):CD006207.
Interventions for the interruption or reduction of the spread of respiratory viruses. Jefferson T, Foxlee R, Del Mar C, Dooley L, Ferroni E, Hewak B, Prabhala A, Nair S, Rivetti A.
First of all, I would like to clear that there has been an newer revision of the this report (issue 3,2009). It elaborates on the six case-control studies suggesting that implementing barriers to transmission, isolation, and hygienic measures are effective at containing respiratory virus epidemics. However, there were no studies on the roles of hand in the transmission of viral disease. Furthermore, this report also denies that fact that antiviral and vaccination can prevent the spread of disease., which in my opinion is a very poor statement.
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