Vaccine Mandates: A Timeline

Vaccine mandates have been part of public health for more than two centuries, beginning with efforts to control smallpox and later expanding to protect children through school-entry requirements. Over time, they have reflected both advances in medical science and shifting public attitudes toward disease prevention. Today they are at the center of the debate over personal liberty vs. public health, specifically concerning vaccine requirements and nonmedical vaccine exemptions for schoolchildren. The history of these mandates highlights the continuing tension between individual freedom and collective responsibility in the fight against infectious disease.

18th–19th century: Beginnings

• 1777: U.S. Gen. George Washington orders smallpox inoculation for Continental Army troops, one of the first mass vaccination mandates in history.
• 1806: Thurgau, a canton of the Swiss Confederation, becomes the first state to make smallpox vaccination compulsory.
• 1853: In England the Vaccination Act makes smallpox vaccination mandatory for infants and introduces penalties for noncompliance.
• 1855: Smallpox vaccination becomes a requirement for schoolchildren in Boston, one of the earliest school-entry mandates.

Late 19th–early 20th century: Expansion and legal precedents

• 1870s–90s: Mandatory smallpox vaccination laws expand in many regions of the United States and Europe.
• 1905: In Jacobson v. Massachusetts, the U.S. Supreme Court upholds state authority to enforce compulsory smallpox vaccination, establishing a key legal precedent.
• 1922: In Zucht v. King, the U.S. Supreme Court affirms that schools may exclude unvaccinated children, even outside of outbreaks.

Mid–late 20th century: Modern public health frameworks

• 1940s–50s: Many countries establish national immunization programs that require vaccines for children, including vaccines against diphtheria, pertussis, tetanus, and polio.
• 1948: Japan’s Immunization Act makes vaccines legally required; the mandate is repealed in 1994.
• 1960s–70s: Measles, mumps, and rubella vaccines, ultimately combined into MMR vaccine in 1971, are added to childhood requirements in the United States and Europe.
• 1978: The Expanded Program on Immunization in China makes core vaccines, including BCG vaccine (against tuberculosis), polio vaccine, DTP vaccine (against diphtheria, tetanus, and pertussis), and measles vaccine, obligatory for children.
• 1980: All U.S. states enact vaccine requirements for entry into public school, with mandates covering multiple diseases.

21st century: Shifting policies and public debate

• 2015: In California, Senate Bill 277 eliminates personal and religious exemptions for schoolchildren following deadly measles outbreaks.
• 2018–19: Several European countries, namely Italy, France, and Germany, tighten vaccine mandates in response to a resurgence of measles.
• 2020–21: The COVID-19 pandemic prompts new vaccine mandates for health care workers, federal employees, and in some countries, the general public.
• 2022–23: Many COVID-19 vaccine mandates are rolled back following court challenges and shifting public health strategies.
• 2025: Florida moves to phase out all childhood vaccine mandates for public schools, bringing the issue back into the national spotlight.