In the case of vaccines a child is statistically far more likely to suffer from catching the disease after not being vaccinated than they are likely to suffer from side effects which, though known, only affect a tiny minority of vaccinated children.
Medically speaking, Magenta8, is 100% correct here.
My DGS was one of the very few children badly affected by the MMR vaccine. It was awful, within 2 weeks of the vaccine being given, he was rushed to A & E covered in black bruises. I don't just mean rashes, these bruises looked like he had been beaten black and blue. Doctors at the hospital suspected leukaemia, his platelet count was in his boots. Luckily, one paediatrician thought outside the box and diagnosed ITP - Immune Thrombocytopenic Purpura - which can be caused by medications snd injections. My DGS was referred on to Barts, he was unable to fly abroad or play sports for quite some time and any tumble or periods of stress resulted in more bruises all over his body.
It was horrific and scary, BUT despite all this, and the reason for my lengthy post, is that the advice from specialists was, and is, to still have the vaccine ........ because a child is statistically far more likely to suffer from catching the disease after not being vaccinated.