Baseline Characteristics of the Cohort and percentage infected at 6 months.

*34 specimens were unusable at baseline**Only children in this age group had assessment of facial cleanliness at baseline.***the number reflects other children in household infected/having clinical disease/not treated, not counting the index child****4 households missing information&From a logistic model with infection at 6 months as the outcome accounting for clustering at the household level,#linear trend.