![Immunization poster from 1977 features Star Wars characters, R2-D2 and C3PO.](/sites/default/files/styles/large/public/article18-19/Star%20Wars%20Immunization%20Poster_0.jpg?itok=Q3OyXizh)
Star Wars Immunization Poster
![Infected workers punish the measles god, while a doctor and drugstore keeper try to protect the god in this 1862 Japanese image.](/sites/default/files/styles/large/public/article18-19/Japanese%20Measles%20Poster_0.jpg?itok=OQC5K0uI)
Japanese Measles Poster
![This meme circulated online in 2015 after 125 confirmed measles cases were traced back to seven infected Disneyland tourists.](/sites/default/files/styles/large/public/article18-19/Meezles%20Meme_0.jpg?itok=tXpQU-I8)
"Meezles" Meme
![Photograph of a young boy in 1970 showing off his 'Official Rubella Fighter' membership card and button.](/sites/default/files/styles/large/public/article18-19/Rubella%20Fighter_0.jpg?itok=kmM33Rb0)
Rubella Fighter
![Title page of Zabdiel Boylston’s An Historical Account of the Small-pox Inoculated in New England, published in 1730.](/sites/default/files/styles/large/public/article18-19/Boylston%20Account_0.png?itok=WvdvTMe6)
Boylston Account
![Gillray’s 1802 caricature of vaccinated men and women growing cow parts on their bodies.](/sites/default/files/styles/large/public/article18-19/Gillray%20Cartoon.jpg?itok=kaJeabhV)
Gillray Cartoon
![Front and back of a medal presented by British naval medical officers to Edward Jenner in 1801.](/sites/default/files/styles/large/public/article18-19/Jenner%20Medal.jpg?itok=etYNwbRG)
Jenner Medal
![British poster urges people to get free vaccinations at specific locations in Liverpool in 1851.](/sites/default/files/styles/large/public/article18-19/UK%20Smallpox%20Poster.jpg?itok=WfiNiPFQ)
UK Smallpox Poster
![Immigrant families were often the target of smallpox raids, like this 1901 skirmish in Milwaukee, WI.](/sites/default/files/styles/large/public/article18-19/Smallpox%20Raid.jpg?itok=mUrjse1F)
Smallpox Raid
![Laboratory worker in 1895 sterilizing chicken broth in autoclaves at the Pasteur Institute.](/sites/default/files/styles/large/public/article18-19/Pasteur%20Institute.jpg?itok=WoS-ve1J)
Pasteur Institute
![German caricature illustrating von Behring’s late 19th century experiment with diphtheria toxin and horses.](/sites/default/files/styles/large/public/article18-19/von%20Behring%20Antitoxin.jpg?itok=D88yhYap)
von Behring Antitoxin
![Maurice Brodie (top left); John Enders (top right); Jonas Salk (bottom left); Albert Sabin (bottom right).](/sites/default/files/styles/large/public/article18-19/Polio%20Virologists.jpg?itok=PpfAInKn)
Polio Virologists
Maurice Brodie (top left); John Enders (top right); Jonas Salk (bottom left); Albert Sabin (bottom right)
![In this 1963 poster, 'Wellbee,' the CDC’s national symbol of public health.](/sites/default/files/styles/large/public/article18-19/Wellbee%20Poster.jpg?itok=P6rdwkfm)
Wellbee Poster
![New York public service posters from the 1960s and 1970s.](/sites/default/files/styles/large/public/article18-19/Rubella%20Posters.jpg?itok=7xYkIy1G)
Rubella Posters
![Anti-vaccination supporters at the 2008 'Green Our Vaccines' march in Washington, D.C.](/sites/default/files/styles/large/public/article18-19/Mercury%20Vaccine%20Protestors.jpg?itok=xr7qTB5B)
Mercury Vaccine Protestors
![National Institute of Allergy and Infectious Diseases’ 2010 chart illustrates how vaccinations can prevent disease outbreaks.](/sites/default/files/styles/large/public/article18-19/Herd%20Immunity.jpg?itok=-a9mjLz9)
Herd Immunity
![U.S. Centers for Disease Control and Prevention (CDC) chart shows number of reported measles cases from September 30, 2018 to October 1, 2019.](/sites/default/files/styles/large/public/article18-19/CDC%20Measles%20Chart.gif?itok=GjC8NPOy)
CDC Measles Chart
![This 1802 etching shows a horned monster being fed baskets of infants and excreting them to symbolize vaccination and its effects.](/sites/default/files/styles/large/public/article18-19/Vaccination%20Monster.jpg?itok=JTvyv-xF)
Vaccination Monster
![Vaccination rates and exemption status of American children 4-6 years old from 2016-2017.](/sites/default/files/styles/large/public/article18-19/School%20Vaccination%20Chart_0.png?itok=qoKmFjQT)
School Vaccination Chart