Histology and ISH of 5-3L at week 37 after MmuPV1 infection in the vaginal tract without wounding. (a) Vaginal tract by H&E at × 10; (b) cervix by H&E at × 10; viral DNA positive cells were present in (c) the vaginal tract, × 10, arrow, as well as (d) the cervix, × 10, arrow, by ISH.