In 1721, a groundbreaking public health advancement took place with the introduction of smallpox inoculation in Boston. Led by Cotton Mather and Dr. Zabdiel Boylston, this method involved infecting individuals with a mild form of smallpox to induce immunity. Despite initial resistance and controversy, the practice significantly reduced mortality rates during the epidemic. Inspired by techniques from Africa and Asia, this pivotal event laid the foundation for modern vaccination strategies, transforming disease prevention.