The BBC's Geeta Pandey in Port Blair says refugees being brought to the capital are being kept in school buildings, which have been turned into relief centres.
But "it is not absolutely a cause for alarm that if your child is born prematurely, something terrible is going to happen to it", said Dr Geeta Swamy of Duke University Medical Center, who carried out the research.
At the clinic, run by Dr. Geeta Shroff, a former obstetrician and pediatrician who admits she is self taught in the practice of stem cell medicine, Cash received embryonic stem cell injections for a disorder that resembles Down syndrome and is caused by a missing part of his X chromosome.