drinking a solution made at the right concentration and consumed at the right rate could be almost as effective as delivery via feeding tube or IV.29 This meant the treatment could be delivered with no equipment, and using extremely cheap and widely available ingredients. Since then, this astonishingly simple treatment has been used all over the world, and the annual rate of child deaths from diarrhoea has plummeted from around 5 million to 1.5 million.30 Researchers estimate that the therapy has saved over 50 million lives to date, mostly children’s.
