A cluster-randomised design will be used. Of the 20 selected unions in the selected sub-districts/upazilas, 10 will be randomly assigned to intervention and 10 to comparison, that is, about 200,000 population (~40,000 households) in each arm. In both intervention and comparison unions, the common MNCS intervention package will be uniformly implemented, which includes training of community-based health workers on essential newborn care. Details of the MNCS intervention package and delivery systems can be found in Annex I. All the MNCS upazilas have also already implemented facility-based IMCI.