Prevent the establishment of cellular antiviral state by blocking the interferon-alpha/beta (IFN-alpha/beta). Interacts with host STAT1 protein in the nucleus, blocking it's phosphorylation by IFN-alpha/beta. Also blocks antiviral state induced by Toll-like receptor 3/TLR3 binding to dsRNA. Interacts with host STAT1. Partially edited. RNA editing at this position consists of an insertion of one or two guanine nucleotides. The sequence displayed here is the W protein, derived from the +2G edited RNA. The unedited RNA gives rise to the P protein (AC Q9IK91), the +1G edited RNA gives rise to the V protein (AC Q997F2) (By similarity). The P/V/C gene has two overlapping open reading frames. One encodes the P/V/W proteins and the other the C protein.