Not yet investigated
What we have so far
Incubator oxygen made it the leading cause of childhood blindness in the 1950s. Restricting oxygen then raised deaths and cerebral palsy. There was no setting of the dial that was free.
This star is on the map because the show intends to take the question apart properly — the trials, how it is actually tested, whether the thing sold is the thing studied. That work is not done yet, and nothing here should be read as a conclusion. When the investigation is published it will appear on this page.