Vaccines have been said to be one of the greatest medical discoveries of our time. Untold lives have been saved because of them. In fact, diseases that were once common were close to being eradicated. Some of us wondered if vaccines were still necessary. But now many of the diseases we thought were gone are beginning to make a comeback because vaccination levels have dropped. And Montana lags behind the rest of the nation in regard to immunizations. Vaccines prevent serious diseases and have helped to lower the rates of these diseases in the U.S. We present this information here to help you make informed decisions about vaccinations.