Immunization protects future generations. Vaccines have reduced and, in some cases, eliminated many diseases that killed or severely disabled people just a few generations before. For example, smallpox vaccination helped eradicate that disease world wide. Your children don’t have to get smallpox shots any more because the disease no longer exists. If we keep vaccinating now, parents in the future may be able to trust that diseases like polio and measles won’t infect, cripple, or kill children.