Since the first vaccine centuries ago, immunizations have become more important. But, with mass vaccinations come high costs.
With less known diseases at the time, children only received two vaccines in the 1950s: smallpox and diphtheria. According to a report by Clinical Infectious Diseases, pediatricians were able to administer these shots for as little as a dollar.
The polio vaccine was administered for the first time in 1955 which became part of the immunization schedule for children. These three shots became the standard for quite some time. In the 1970’s and 1980s, only half of school-aged children were vaccinated.