Most vaccinations are unnecessary and could possibly cause more harm than good. Pharmacutical companies are banking on every prescription and not telling us the whole truth. The average tetanus shot lasts longer than they claim and a pet rabies shot that most of us give our pets once a year, actually last 10 years. But think of the money they would lose if we only vaccinated once a year.
I hope everyone will read "What your doctor may not tell you about childrens vaccinations" by Stephanie Cave, M.D. This book changed my opinion about vaccinations. The book will also give you a recommended timeline of necessary vaccinations, if you still wish to do so. It is great.