FIG. 5.
Long-term sterilizing immunity provided by v2RVFH. Groups of four cattle (open symbols in the left panels) were vaccinated intramuscularly with 108 PFU of v2RVFH and challenged 3 (A and B), 8 (C and D), 11 (E and F), or 16 (G and H) months later with RPV. Two naive cattle (solid symbols in the left panels) were added at the day of each challenge. Rectal temperatures were taken daily (left panels). The symbol † indicates death of an animal. SN antibody titers to RPV were determined weekly (right panels). Numbers in the center panels identify individual animals.