Physical interventions to interrupt or reduce the spread of respiratory viruses: systematic review.

This resulted either in a reduction in the incidence of rhinovirus infection among volunteers using different combinations of acids for cleaning (P=0.025) 17 or did not reach statistical significance (13% v 30% with combined denominator of only 60). 17 When iodine treatment of the fingers was used, one of 10 volunteers in the intervention arm became infected compared with six of 10 in the placebo arm (P=0.06, Fisher’s exact test). 16 Eight cluster randomised studies tested educational programmes to promote handwashing with or without antiseptic agents on the incidence of acute respiratory tract infections either in schools or in households.

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