For example, I have had the full series of Hep B vaccinations. I never developed antibodies. I can get Hep B just as easily as someone who has never been vaccinated.
Another example: My friend's son contracted measles even though fully vaccinated. Evidently, he never responded with antibodies when vaccinated.
So everyone is supposed to put themselves and/or their children at risk of vaccine side effects to protect complete strangers. Do you take blood pressure medication to prevent someone else from getting high blood pressure? One should only have to take vaccines/medications to benefit themselves. Sorry, but I dont care about the herd.