I did some research on this for a uni assignment earlier this year.
I found that according to reputable resources, while there are risks associated with vaccines i.e. high fevers leading to seizures, anaphylaxis etc, the risks associated with getting the disease are actually higher than the potential for vaccine related complications. Some infectious diseases i.e. measles can sometimes lead to death, even with our current medical knowledge. I highly recommend vaccination to all children who are eligible.
When I bestride him, I soar, I am a hawk: he trots the air; the earth sings when he touches it; the basest horn of his hoof is more musical than the pipe of Hermes. ~William Shakespeare