“It can Happen Again, this Time its Global” – Hamilton Canada, June 16, 2023

Recent public and professional debate about smallpox vaccine and its risks provides the framework for evaluating the ethical justification for conducting clinical trials on children. Dryvax is a particularly impure product made of live vaccinia virus harvested from the pustules of calves infected with (it is believed) cowpox. Although the vaccine, which is scratched on the skin, only causes mild infections in most people, in a small but significant number the infection caused serious adverse reactions similar to the complications of the disease they were designed to prevent: painful, disfiguring skin disorders, blindness, neurological impairments and death.