Plays an essential role in the inhibition of host immune response. Prevents the establishment of cellular antiviral state by blocking interferon-alpha/beta (IFN-alpha/beta) production and signaling pathway. Interacts with host IFIH1/MDA5 and DHX58/LGP2 to inhibit the transduction pathway involved in the activation of IFN-beta promoter, thus protecting the virus against cell antiviral state. Blocks the type I interferon signaling pathway by interacting with host STAT1 and STAT2 and thereby inhibiting their phosphorylation and subsequent nuclear translocation. Efficiently blocks the type II interferon signaling pathway (By similarity). Interacts with host IFIH1/MDA5, DHX58/LGP2, STAT1 and STAT2. Partially edited. RNA editing at this position consists of an insertion of one or two guanine nucleotides. The sequence displayed here is the V protein, derived from the +1G edited RNA. The unedited RNA gives rise to the P protein (AC O55778), the +2G edited RNA gives rise to the W protein (AC P0C1C6). The P/V/C gene has two overlapping open reading frames. One encodes the P/V/W proteins and the other the C protein. Belongs to the paramyxoviruses V protein family.