(link)
He has an undergraduate degree (M.D.) in a non-science subject and a postgraduate degree (Ph.D.) in economics.
“He earned his Doctor of Medicine (M.D.) from the Stanford University School of Medicine in 1997 (but never had a residency/fellowship and never practiced medicine, link).
An M.D. degree is not a science degree! (link)
Biology vs Science (link)
My training and expertise – people ask! (link)