RESULTS	Vitamin A made no difference to gut permeability of uninfected infants ( lactulose/mannitol ratio for vitamin A group : 0.11 , 95 % confidence interval [ CI ] 0.08 , 0.15 , n = 73 and for placebo group : 0.09 , 95 % CI 0.06 , 0.12 , n = 76 ) , but largely prevented the increase in the ratio of HIV-infected infants ( vitamin A group : 0.17 , 95 % CI 0.13 , 0.23 , n = 23 ; placebo group : 0.50 , 95 % CI 0.37 , 0.68 , n = 20 ) .\