Case-area targeted interventions and free chlorine residual in household drinking water: An observational cohort study during a cholera outbreak in Northeast Nigeria.

For households using unimproved water sources, Aquatabs use showed a trend toward improved FCR (aOR 0.12 [95%CI: 0.01, 1.19]; p = 0.070), though the association was not significant and should be interpreted with caution due to the low number of observations.

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