Kittens usually receive a combination vaccine for feline distemper, rhinotracheitis and
calcivirus at seven weeks, 10 weeks and 13 weeks, with a separate rabies vaccine at 12 or 13 weeks.
One study found adequate serum antibody titers to last for
at least 6 years for feline panleukopenia virus, 4 years for feline
calcivirus, and 3 years for feline herpesvirus in cats vaccinated
at 8 and 12 weeks of age with polyvalent killed vaccine.