Recognizing the need for appropriate and reliable data to help protect the rights of PWD and achieve a better inclusion of disability in National AIDS Control Programmes, the Institute of Research for Development (IRD), the Institut de Formation et Recherche Demographique (IFORD) and Handicap International (HI) propose this study that aims to provide quantitative and qualitative data on the vulnerability of PWD to HIV infection in Cameroon and Burkina Faso, in order to define if this vulnerable population is also a Key Population in relation to the HIV epidemic. This study adopts a multidisciplinary approach (quantitative and qualitative methods). Quantitative data are collected only in Cameroon.