Orekunrin and her family immediately began looking for an air ambulance service to rapidly transport the girl, a sickle cell anemia sufferer, to a more suitable healthcare facility.
And although the trial will help to work out the best way to deliver the fuel cell's hydrogen, and how to build a suitable distribution network, it will not necessarily bring the price down to the point where fuel cells can compete with petrol or diesel.
There are some cells on the margin of adult retinas that have been identified as having stem cell-like properties, which the team says could be suitable.