One of the most attractive aspects of vaccine rejectionism, indeed of all “alternative” health, is that no particular knowledge is necessary to declare yourself an expert. It doesn’t matter that you don’t have even the most basic knowledge of science and statistics. It doesn’t matter that you don’t have any understanding at all of the complex fields of immunology or virology. Your personal experience qualifies you as an expert. Hence Jenny McCarthy and Jim Carrey, two actors with no training of any kind in science, are touted by themselves and others as “experts” on vaccination.
As the paper The Persuasive Appeal of Alternative Medicine explains:
The person-centered experience is the ultimate verification and reigns supreme in alternative science… Alternative medicine makes no rigid separation between objective phenomena and subjective experience. Truth is experiential and is ultimately accessible to human perceptions… [O]bjective diagnostic or laboratory tests that discern what cannot be felt never replace human awareness… [A]lternative medicine, unlike the science component of biomedicine, does not marginalize or deny human experience; rather, it affirms patients’ real-life worlds. When illness (and, sometimes, biomedicine) threatens a patient’s capacity for self-knowledge and interpretation, alternative medicine reaffirms the reliability of his or her experience.