Prevention of Upper Respiratory Tract Infections by Gargling: A Randomized Trial
A total of 130 participants contracted URTIs. The incidence rate of first URTI was 0.26 episodes/30 person-days among control subjects. The rate decreased to 0.17 episodes/30 person-days in the water gargling group, and 0.24 episodes/30 person-days in the povidone-iodine gargling group.
うがい薬効果が確認できないというのがちょっと不思議だけど。京大保健管理センターの川村孝所長ら。