The antibody response of cheetahs (Acinonyx jubatus) to modified live virus vaccine against feline panleukopenia (FPLV), herpes (FHV) and calici (FCV) viruses was assessed by means of an enzyme-linked immunosorbent assay (ELISA). In the first year of study, 82 cheetahs were bled pre-vaccination. Of these, antibody levels to FPLV were found in 100% of the animals. Only 54% were found to have antibodies to FHV and 99% had antibodies to FCV. One month after booster vaccination with the same vaccine, increased antibodies to FPLV, FHV and FCV were seen in 19 (58%), 18 (55%) and 25 (76%) of these animals, respectively (n = 33). In the second year of study, 65 cheetahs were bled pre-vaccination. Fifty three of these animals were negative for antibodies to FPLV while 28 were positive for FHV and 64 were positive for FCV. These animals were then bled 1, 2 and 6 mo post booster vaccination. The antibody levels to the various viruses showed different trends with time.