Measles virus (MV) and rhabdovirus expression vectors. (A) MV vector, where the gene of interest can be inserted either between the P and M genes or the HA and L genes. (B) Rabies virus (RABV) vector with the gene of interest inserted either between the N and P genes or the G and L genes. (C) Vesicular stomatitis virus (VSV) vector with the gene of interest inserted between the M and L genes. CMV, cytomegalovirus promoter; Fu, fusion protein; G, glycoprotein; HA, hemagglutinin; L, large; M, matrix; N, nucleocapsid protein; P, phosphoprotein; T7, T7 RNA polymerase promoter; T7t, T7 terminator.