Vaccines represent the most important medical advance of the twentieth century. The time has passed when large numbers of children and adults suffered serious, life threatening illness from viruses including poliovirus, measles virus, influenza viruses, hepatitis B virus and varicella zoster virus or faced lifelong disability or death from bacterial infections including Hemophilus influenzae, meningococcus and pneumococcus, all infections that can be prevented now by effective vaccines.
Goebel LJ, Norton NB, Mufson MA. Immunizations for adults and children. West Virginia Medical Journal. West Virginia State Medical Association, 2012 May/June;108(3):22-28.