Fig. 3From: Risk of dengue, Zika, and chikungunya transmission in the metropolitan area of Cucuta, Colombia: cross-sectional analysis, baseline for a cluster-randomised controlled trial of a novel vector tool for water containersA concrete ground tank for washing purposeConcrete ground tanks for washing (lavadero) are made of cement or ceramic tiles with the shape of a rectangle or square and variable sizes (size measurement in the photo)Back to article page