Recently, and particularly important in disease significance since 1995, ALV Subgroup-J has emerged from genetic recombination between ALV exogenous and endogenous (cellular) elements.

• 最近， 并且特别重要在疾病意义自1995年以来， ALV小群J从基因再结合涌现了在ALV外生和内在(多孔的)元素之间。