I've started off by buying a couple of books to get informed. I've just opened The Vaccine Book by Dr. Sears and I've already had like 10 questions pop in my head. I'm on page 6...
My questions to all of you pertains to immunity and the doses - he's explaining the "why so many doses" and states that the 1st dose gives about 50% immunity and up to the last which brings immunity up to 90%. And then boosters are added later because immunity wanes over time.
1. If a person acquires one of these diseases naturally, does immunity wane over time as well?
2. I've not heard of this great push to have adults vaccinated... if immunity after vaccination decreases and requires a booster, how come the vaccine schedule doesn't accommodate adults?
3. For the non-live vaccines, he states that the doses provide about 90% immunity, but if you stopped at the dose before that, it would be 75% immunity. Why bother with that last dose? What's the real difference between 75% and 90% if you're not 100% immune?