Epidemiological studies that ignore mechanism of disease causation are flawed and mechanistic evidence demonstrates that vaccines cause autism
Since vaccinologists are themselves ignorant of vaccine mechanisms, how can we expect epidemiologists to understand the mechanisms? So most epidemiological studies ignore mechanism of adverse event causation. If you ignore mechanism, you cannot design the study with appropriate controls. So the results of such epidemiological studies have to be discarded due to confounding.
Proven mechanism involved in cow's milk contaminated vaccines causing folate receptor antibody related autism is described.