"Herd Immunity" is just another way of saying they're only marginally effective, at best. This is confirmed by the fact that we see measles outbreaks in 99% vaccinated populations. Not only are they of questionable efficacy, they frequently spread the disease they're supposed to prevent. It's that darned "attenuation" thing. Too much attenuation of the antigen, and it's useless. Not enough and you're infected.

Vaccines are modern day homeopathy, but worse. Instead of being an infinitesimal dose, they're a giant dose of the pathogen they're supposed to prevent/cure. No thanks.