One aspect of the present invention provides methods of treating a viral infection in a subject including administrating a therapeutically effective amount of at least one Wnt ligand protein selected from Wnt1, Wnt2, Wnt2B, Wnt3, Wnt3A, Wnt4, Wnt5A, Wnt5B, Wnt6, Wnt7A, Wnt7B, Wnt8A, Wnt8B, Wnt9A, Wnt9B, Wnt10A, Wnt10B, Wnt11 and Wnt16. In one embodiment, the subject is a human and the infection is a human immunodeficiency virus infection. Another aspect provides drug combinations for treating viral infections.