Vaccinations are the most important preventive measure you can take for the health of your pet. Health threats vary from city to city and even in various sections of cities. Therefore, your veterinarian can tailor an immunization program for your pet based on local conditions. Your dog or cat generally can be immunized for the following diseases: Dogs can be immunized against distemper, hepatitis, leptospirosis, parainfluenza, parvovirus, coronavirus, Bordetella, rabies, and Lyme disease. Cats can be immunized against feline panleukopenia (distemper), rabies, feline rhinotracheitis, calicivirus, chlamydia, feline leukemia, and FIP.