Same untested and unknown results of the Thalidomide medical trials.
https://en.wikipedia.org/wiki/Thalidomide"Experts estimate that thalidomide led to the death of approximately 2,000 children and serious birth defects in more than 10,000 children."
"It is not known exactly how many worldwide victims of the drug there have been, although estimates range from 10,000 to 20,000. Despite the side effects, thalidomide was sold in pharmacies in Canada until 1962."