Investigation of aqueous extract of Moringa oleifera Iam seed for antiviral activity against Newcastle disease virus in ovo - Chollom, S C; Agada, G OA; Gotep, I G; Mwankon, S E; Dus, P C; Bot, Y S; Nyango, D Y; Singnap, C L; Fyaktu, E J; Okwori, A EJ (J Med Plants Res, 2012)