Journal Article
                        
                        Billong, Serge C, Jacob  Dee, Joseph  Fokam, Georges  Nguefack-Tsague, Gabriel L Ekali, Raoul  Fodjo, Edith S Temgoua, Edson-Joan  Billong, Samuel M Sosso, and Jembia J Mosoko.  
"Feasibility Study of HIV Sentinel Surveillance using PMTCT data in Cameroon: from Scientific Success to Programmatic Failure." BMC Infectious Diseases 17, no. 1 (2017): 3.