About ICI
Meet the Heart Behind the Research
The Institute of Chronic Illnesses (ICI) is led today by David Geier, a researcher, advocate, and speaker carrying forward a legacy of truth-seeking, scientific rigor, and public health transparency.
Having worked alongside his late father, Dr. Mark Geier, for many years, David brings both deep experience and renewed vision to ICI’s mission. With a background in biomedical research and a passion for uncovering the root causes of chronic illness, he continues to speak out on the critical health challenges facing children and families today — including the effects of mercury, fluoride, and vaccine safety concerns.
As a next-generation leader, David is guiding ICI into a new era: expanding research, deepening public dialogue, and advocating for policies that prioritize human health over politics or profit. His work reflects a balance of courage and compassion, grounded in science and driven by the belief that people deserve answers — and action.
While the heart of ICI was shaped by his father’s unwavering dedication, David Geier now carries the mission forward, with clarity, strength, and a bold sense of responsibility to future generations.
Tribute to Dr. Mark Geier
Dr. Mark Geier was more than a renowned vaccine safety advocate and accomplished researcher — he was a man of conviction, compassion, and courage.
For decades, Dr. Geier dedicated his life to protecting children from preventable harm. His groundbreaking work helped pave the way for the safer DTaP vaccine now in use, sparing countless children from the disabling reactions caused by the older whole-cell DTP formulation.
But beyond the headlines and heated debates, Dr. Geier was a voice for families — especially those facing the devastating effects of chronic illness and neurodevelopmental disorders. His research explored the potential connections between mercury exposure and autism, and though controversial, he never shied away from asking the hard questions.
Together with his son David, Dr. Geier helped give shape to a movement that continues to challenge the status quo in medicine, science, and public health.
His work lives on in the mission of ICI — but so does his heart.
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