For 18 months and every 2 weeks, Fieldworkers will collect information on signs and symptoms of acute respiratory infections and diarrhea in the last 14 days, current breastfeeding status and vital status of study children. They will also be trained to take the child's temperature, count the respiratory rate twice using a UNICEF respiratory rate stop watch, examine for lower chest wall indrawing, look for dehydration and refer to the study clinic as appropriate. The causes of death occurring at home will be ascertained using a verbal autopsy.