“In terms of herd immunity, you not only have … this selective pressure that’s keeping you from being able to achieve herd immunity (because the microorganisms are always attempting to evade the vaccine), but pertussis vaccine is only 60 percent effective. That’s with the best estimates. And that’s only for a couple of years.
Studies show that even after three, four or five years, you’re back to almost no efficacy whatsoever, almost back to the pre-vaccine period.
How can you expect to achieve herd immunity with a vaccine that is only 60 percent effective? You can vaccinate 100 percent of the population and you cannot achieve herd immunity with a vaccine that is only 60 percent effective. Influenza vaccines — many years, these vaccines are not good matches for the circulating virus — so you have zero percent efficacy. In the best years, you only have 30, 40 or 50 percent efficacy.”