There are plenty of areas where modern medicine has failed us. Vaccines are NOT one of them. Polio, Diptheria, Rubela, Smallpox, Measles were all widespread and have decreased because of vaccines. Please listen to logic, and real science.
I understand those who distrust modern medicine because it does indeed have areas with a profit motive and business model which thrives on illness. There have indeed been misuses of “science” and non-scientific justifications for money-making drug pushing schemes. The market for psych drugs to teens and children for example is a problem as is the repression of certain natural treatments and cures.
But these diseases are real and the scientific method is real. With ALL medicine be it a funky holistic cure, mainstream modern medicine, ancient Chinese medicine or an over the counter remedy- we should look to real science. The good old scientific method we learned in schools is real and reliable. By that standard vaccines do work, they cure real diseases and have and are continuing to eradicate disease worldwide. There is no credible scientific evidence to the contrary.

http://www.npr.org/blogs/health/2013/03/29/175626824/the-number-of-early-childhood-vaccines-not-linked-to-autism