While I don't agree and think it is dangerous not to vaccinate children, I understand your concern given that some vaccines do have mercury in them. I am not for all vaccinations as I think sometimes they over-vaccinate people. However, I know that State insured daycares and all public schools require vaccinations to attend. Vaccines generally protect a person's health. Certain things if children catch it are very likely to deathly ill or worse. Other things it is best to ensure they get vaccinated to have a safe and healthy adulthood. Such as chickenpox can be extremely bad if caught during adulthood.
I wish they had had the rotavirus vaccine out before my son caught it when he was 18 months. Those three days at the hospital were the scariest of my life. Rotavirus nearly took my son's life. The doctor and I first thought it was a simple stomach flu, but when my son started to become dehydrated I rushed him to the ER. My bright vibrant never slow down kid got dehydrated so quickly he was just a limp gray form in my arms by the time we arrived a very short 5 minutes later. They got him to rehydrate and told me to come back if he got dehydrated again. Unfortunately, he did and another terrifying rode to hospital.
They admitted him in the hospital and kept him on an IV, but even with a IV he was still in very bad shape. He stayed dehydrated badly due to the havoc the rotavirus did. (It causes severe vomiting and diarrhea.) The second night in the hospital was the worst. My son was so bad that the doctor and I feared he wouldn't make it through the night since he was so deathly pale and completely unresponsive. Luckily, by the Grace of God he did pull through with a full bounce back.
So please think very hard about the risk you could be taking. I know as a mom you have to do what you think is best, but hope you do choose to vaccinate.