This study will determine if a combination of 3 drugs used to treat the infection that cause lymphatic filariasis (LF) due to Wuchereria bancrofti infection are more effective in killing or sterilizing the adult worms compared to just 2 of the 3 drugs that usually given to treat this infection. The three drugs used together are called albendazole (ALB), ivermectin (IVM) and diethylcarbamazine (DEC). The usual treatment in Papua New Guinea (PNG) for lymphatic filariasis are DEC and ALB. A combination of these 3 drugs has not been previously used to treat LF.