From the Cornell Feline Health Center. Possible benign and serious reactions to vaccines, and what veterinarians and you can do to minimize the risk and maximize the benefit of vaccines.

By Wendy C. Brooks, DVM, DipABVP. An in-depth but easy-to-understand article on the relationship between vaccines and cancerous tumors. Contains useful information on preventive strategies and treatment. Bottom line: vaccinate but do it intelligently; don't over-vaccinate; be educated.

By Dr. Robert L. Rogers of CritterAdvocacy.org. This article points out that vaccines are "not usually" dangerous, but alerts the reader on how to recognize mild and serious vaccine reactions in your cat, and what to do if you see them.

From the Cat Clinic of Norman (Oklahoma). This page briefly outlines the clinic's vaccination procedures and addresses questions such as vaccine safety, the relatively new FIV (Feline Immunodeficiency Virus) vaccine, and vaccinating indoor-only cats.

From the American Association of Feline Practitioners (AAFP). An in-depth look at how modern feline vaccines work, how and when they are administered, diseases for which vaccines are manufactured and prescribed, and—perhaps most significantly—recommendations for using vaccines wisely. The report discusses special considerations for shelters, feral cat colonies, and at-risk cats. While the report is aimed at veterinarians and goes into considerable technical detail, it also contains an abundance of useful information for anyone interested in the role that vaccines can and should play in the well-being of cats.
(PDF; 37 pages - 647 KB)