1. Mobility and Clinic Switching among HIV Patients Considered Lost to Follow-up in North-Eastern South Africa • David Etoori, London School of Hygiene and Tropical Medicine; Alison Wringe, London School of Hygiene and Tropical Medicine (LSHTM); Brian Rice, London School of Hygiene and Tropical Medicine; Jenny Renju, Kilimanjaro Christian Medical University College; Georges Reniers, London School of Hygiene and Tropical Medicine (LSHTM).

2. Baisse De La Prevalence Du Vih Au Tchad Entre 2005 Et 2015: Effet De Composition Ou De Performance ?* • Kebmaki Vincent Nguezoumka, Cellule d’Appui à la Recherche et à l’Enseignement des Institutions Francophones d’Afrique (CARE-IFA)/IFORD; Chérif Togbanan, Bureau d'Appui Santé et Environnement; Jean-Yves Gatou, Fonds de Soutien aux Activités en matière de population; Lakiné Fadene, Programme Sectoriel de Lutte contre le Sida et les IST.

3. Adult Life Expectancy in the Antiretroviral Treatment Era: Evidence from Four Population-Based HIV Surveillance Studies in Uganda, Malawi and South Africa. • Georges Reniers, London School of Hygiene and Tropical Medicine (LSHTM); Kathryn Risher, London School of Hygiene and Tropical Medicine; Jeff Eaton, Imperial College London.