There are no short or long-term double-blind tests (vaccinated vs unvaccinated) to demonstrate efficacy, nor safety of vaccines. There are no safe dosages for injected ethylmercury, for aluminum nor for many of the other ingredients.
Anyone who has a legitimate interest in learning about vaccines should go to Amazon or B&N and get books from both pro-vaccine and anti-vaccine perspectives, so that they can make up their own minds.
If they do not get materials about vaccines and the risks of brain damage before they get multiple injections, they may not be able to understand the information afterword.