i guess it depends on what you consider a vaccine
a substance used to stimulate the production of antibodies and provide immunity against one or several diseases, prepared from the causative agent of a disease, its products, or a synthetic substitute, treated to act as an antigen without inducing the disease.
and then I guess your definition of immunity matters
but speaking of immunity have you ever wondered why members of congress and their staff are immune to bidens vaccine mandate?
i want whatever makes them special .... how does covid know not to attack them?