Immunizations are an important part of preventative healthcare. Vaccines help protect us from diseases such as measles, mumps, and tetanus. They work by exposing our body to a small dose of the virus, which triggers our immune system to build up a defense against it. Immunizations are important for children and adolescents because their bodies are still developing. However, immunizations are also recommended for adults. Here's a closer look at why immunizations are important for adults and what immunizations you should consider getting.