Not sure you’ll find the answer to your question but the comments here are very helpful understanding this concept:
“We are fortunate to live in a time when the ARR of a smallpox vaccine is zero. Even one with an RRR of 100%. But that is largely because a high-RRR vaccine was administered globally for decades when any measure of the ARR was vanishingly close to zero.”
You're aware that the smallpox vaccine and the rona 'vaccine' are two different things, right?
Crazy how science works, amirite?
Best not tell them Gardasil (vaccine for uterus cancer) uses mRNA.
Shhhhhhhh we better keep that a secret or heads will explode.