Allegedly, smallpox was eradicated due to an "aggressive vaccination campaign". Ok. So those vaccines...
"Because there is a slight risk of serious reactions and even death from the smallpox vaccine, routine smallpox immunization ended in the United States in 1972."
"People who have very close contact with a person who has gotten a smallpox vaccine can get an infection from the virus used in the vaccine."
"Because there are risks of a serious reaction from the vaccine, routine smallpox immunization doesn't occur."
Enjoy your covid jabs.
That goes for any vaccine, really. Vaccine shedding isn't a new thing.