A couple of generations ago, many children died from infections such as polio and diphtheria. More recently, measles and mumps were ravages of childhood. Today, those diseases are almost unheard of thanks to childhood vaccines. But are all vaccines good, safe or necessary for all children? This episode of Kids Healthworks examines how the Advisory Committee on Immunization Practices determines which vaccines should be recommended for all children, and which should only be given to those with serious underlying conditions. Also, learn about the controversy over the protection a vaccine offers, and its potential for danger to a young immune system.