Percent mortality in the different groups during experimental period excluding rainbow trout that was negative for presence of VHS virus. V = i.p. challenged rainbow trout (O. mykiss), KV = co-habitants with the i.p. challenged O. mykiss, BV = bath challenged O. mykiss, H = group bath challenged with homogenate from VHS virus positive O. mykiss, BK = control group for the two groups of bath challenged O. mykiss, and CH = rainbow trout i.p. challenged with VHS virus from herring (CH18.03.08).