CHIP toolkit: Social mapping and transect walk for childhood infection and pollution - A comparative study across four cities (Jaipur, Jakarta, Antofagasta, and Istanbul).

Background: The Sustainable Development Goals Agenda 2030 underscores the value of sustainable cities, clean water, sanitation, and well-being. In-spite of several improvements, the under-five mortality rates remain quite high, especially in inadequately serviced peri-urban settlements, wherein the environmental conditions, poor sanitation, and limited healthcare exacerbate child health issues. Burdened by rapid urban migration and poor infrastructure, these settlements are prone to the spread of respiratory, gastrointestinal, and vector-borne diseases.