XK and influenza: Our vaccine virus candidate is composed of an H17N10 bat influenza-based genetic backbone (PB2, PB1, PA, NP, NS, M) carrying the immunogenic glycoproteins HA (modified to monobasic cleavage site)35 and NA from an H5N1 AIV (A/swan/Germany/R65/06) with bat-adapted PS, located at the 3′- and 5′-segment ends.