Vaccines are not "one size fits all" 

Vaccines may be safe or may pose high risk side effects, to include death.  Short-term and long-term effects are unknown. 

Vaccine manufacturers are not liable if humans are harmed.  

Vaccine manufacturers do not fully disclose vaccine's ingredients due to Proprietary Information. Without this information, people do not know if there are harmful ingredients that can cause allergic reactions, organ malfunction, neurological damage or other bodily harm to include death. 

In some cases, Doctors are unable to help patients that are harmed by vaccines - do not know potential treatments on how to heal. 

Families of those harmed by vaccines are stuck with the medical bills; the insurance dries up, and in some cases, they end up financially bankrupt.

It takes eons to get through the U.S. Court of Federal Claims (vaccine courts). Red Tape, corruption, and politics contributes to this. 

New bio technologies raise ethical questions with products that are not publicly addressed.

And finally, humans are not medical guinea pigs. We do not consent to DNA Rape.