This document outlines the proper procedure for conducting interviews as part of a medical study. The key steps are: 1) Approach the household to be interviewed and identify the best respondent, such as someone who was with the ill person; 2) Obtain informed consent from the respondent(s) by having them sign a consent form; 3) Conduct the interview in a private location, being sensitive to the respondent's emotional state and addressing any concerns or questions they may have. Communication skills like building rapport, active listening, and responding non-judgmentally are important.