The McCullough Foundation’s report summarizing its analysis of over 300 studies on known risk factors on the causes of Autism Spectrum Disorder (ASD) has concluded that one factor – “combination and early-timed vaccination” in infants and children – is the major driver of risk for ASD. While other non-vaccine factors that parents have heard about for years – including being older parents, having had premature delivery, genetic predisposition, pre-birth drug exposure, and environmental toxins – have contributed to the sharp rise in autism in the United States, only combination and early-timed vaccination has emerged as the dominant catalyst of risk, “consistent across mechanistic, epidemiologic, and clinical evidence,” say authors, Nicolas Hulscher, MPH, et al in the report released today.