Why does my kitten need more than one vaccination for feline distemper, upper respiratory infections, and leukemia?
When the kitten nurses his mother, he receives a temporary form of immunity through his mother’s milk. This immunity is in the form of proteins called antibodies. For about 24-48 hours after birth, the kitten’s intestine allows absorption of these antibodies directly into the blood stream. This immunity is of benefit during the first few weeks of the kitten’s life, but, at some point, this immunity fails and the kitten must be able to make his own long-lasting immunity. Vaccinations are used for this purpose. As long as the mother’s antibodies are present, vaccinations do not “take.” The mother’s antibodies will neutralize the vaccine so the vaccine does not get a chance to stimulate the kitten’s immune system. Many factors determine when the kitten will be able to respond to the vaccines. These include the level of immunity in the mother cat, how much of the antibody has been absorbed, and the number of vaccines given the kitten. Since we do not know when an individual kitten will los
