 Cash and Dr. David Nalin were awarded the Prince Mahidol Prize, also for their role in the development and application of oral rehydration therapy.Oral rehydration therapy is an alternative to intravenous rehydration therapy for preventing and treating dehydration from diarrhea when intravenous therapy is not available or feasible.Oral rehydration therapy is calculated by the World Health Organization to have saved the lives of over 60 million persons.