Teikeu Tessa Vladimir Vivaldi, Doctor of Medicine, Univ.Gamal Abdel Nasser de Conakry, Faculty of Medicine, Pharmacy, Odonto-Stomatology, Conakry, Guinea.Master in Public Health and Epidemiology, Univ. of Dschang, Cameroon.Master in Nutrition and Health, Univ. Gamal Abdel Nasser de Conakry, Guinea.