They're not vaccines, hence the need for the CDC to change their definition, and they are most certainly experimental.
T.B. Yoits wrote: “They’re not vaccines, hence the need for the CDC to change their definition, and they are most certainly experimental.”
That argument relies upon the assumption that a vaccine must provide 100% immunity to be called a vaccine. If that’s the case, then there are no vaccines since none are 100% effective.