PAASIM: Pesquisa Sobre o Acesso à Água e a Saúde Infantil em Moçambique - Research on Access to Water and Children's Health in Mozambique. In the PAASIM study, we are testing if and how improvements in water supply in urban areas of Mozambique reduce or delay enteric pathogen infection, alter gut microbiome composition, and affect enteric dysfunction and other health outcomes in infants.