Dr. Mark Robin Geier, 76, was a renowned vaccinologist who significantly improved vaccine safety through his research. His work helped replace the whole-cell DTP vaccine with the safer acellular DTaP vaccine, reducing adverse reactions in children. Geier also discovered a link between mercury in thimerosal and neurodevelopmental disorders, which shifted his focus towards advocating for vaccine safety reforms. He and his son, David, explored the biochemical anomalies in autism and developed an effective treatment, ultimately contributing to international efforts to limit mercury exposure in vaccines through the Minamata Convention.
Dr. Geier's work led to the replacement of the whole-cell DTP vaccine with the safer acellular DTaP vaccine, preventing adverse reactions in countless children.
His discovery of a link between mercury exposure from thimerosal in vaccines and childhood neurodevelopmental disorders changed his life and spurred urgent reforms in vaccine safety.
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