In all states, rabies vaccinations are required by law. The first rabies vaccination is good for one year. In many states subsequent vaccinations are good for three years. In other states, they are only valid for one year by law. Please check with your vet to determine the legal requirements in your state. Vaccinating your pet for rabies may literally save its life for two reasons. Rabies is a threat in many areas and it is a horrible disease. In addition, an unvaccinated pet who bites a human being, even by accident, is subject to long quarantine periods or even death for the purpose of testing for rabies infection. Don't risk your pet's life. Get its rabies vaccination.