3. Vaccines can be dangerous. – Taking a vaccine or any medication without knowing possible side effects, or possible adverse reactions is something many do and it’s dangerous. It’s dangerous for your child, yourself and your family. Why? Not all vaccines are created equal. Some have pages of adverse reactions reported during tests and from the public. Some have caused children to die. Some, have caused children to all of a sudden become have severe issues with communication and behavior. Some have other side effects which is equally damaging.