Some infectious diseases such as panleukopenia and rabies can be effectively prevented through the use of vaccines while others such as herpesvirus can be minimised though not completely prevented. Still others like FIV have had vaccinations made for them but have proven so ineffective that we no longer recommend using them. The cats we vaccinate also vary widely in their risk of exposure and probability of developing the disease. With so many variables, we believe in vaccinating cats according to their individual needs rather than a strict general protocol. That can mean anything from vaccinating annually to every 3 years to, in rare cases, not at all.