Vaccines are good.
Infectious diseases are no longer the leading cause of death like they were a century ago. Sure, they are also big business now, as marketing for HPV and Shingles can attest, but that doesn't mean just anything can or should be a vaccine.
Except in Canada. Health Canada
has licensed 10 products with a homeopathic preparation called “influenzinum” for "preventing the flu and its related symptoms" and even homeopathic preparations to prevent polio, measles and pertussis - despite the fact that they are so diluted they have no active ingredient at all, they are just placebos.