People just use Jenny McCarthy as the stand in for "anyone who is not a doctor but purports to give medical advice". She deserves every iota of insult she receives because she went on television and attempted to use her celebrity to convince people that her non-medically based, and incorrect, opinions had some sort of medical significance. No, she's not the sole cause of the anti-vaccine misinformation out there, but its understandable why people harp on her. That being said, any reason that parents use for not vaccinating their children, if it does not come directly from a licensed medical professional who personally knows their children, is not a good one, and should not be respected. I don't care if its something the parents read (what they would call research) on the internet. I don't care if its something they heard at a cocktail party. I don't care if a close friend of theirs had a bad experience vaccinating their kids. I don't care if a religious leader told them that their religious text was against vaccines. I don't care if the parents have personal experience with a child they believe (almost certainly erroneously) to have been harmed by vaccines. The correct reasons for not vaccinating your child come from: (1) a individual who went to medical school and (2) has a valid and current license to practice medicine in your state, who has (3) personally examined your child in a professional setting and come to the opinion that vaccines are unsafe for them. That is all.