From The Atlantic: The Victorian Anti-Vaccination Movement.

The dewy chill over Leicester, England, in March 1885 did not deter thousands of protesters from gathering outside nearby York Castle to protest the imprisonment of seven activists. Organizers claimed as many as 100,000 people attended, although historians estimate it was closer to 20,000.

The cause they rallied against? Vaccination.

This movement has faded from popular memory, obscured by the controversy of more recent anti-vaccination efforts, which gained momentum in the 1990s. However, the effects of the Victorian anti-vaccination movement still echo in the debate over the personal belief exemption, which was banned in California in June.

On the day the Leicester protesters gathered, vaccination was mandatory in England. Nearly a century before, Edward Jenner, a Scottish physician, had invented a method of protecting people against the raging threat of smallpox. The treatment was called variolation, and it involved [continue]