Since the late 1970s, oral rehydration therapy (ORT) has turned once-fatal diarrheal diseases like cholera into routinely and cheaply treatable conditions. Estimates suggest ORT has saved more than 70 million lives since its introduction, many of them children. Learn more about the man who developed oral rehydration therapy: https://humanprogress.org/heroes-of-progress-pt-20-david-nalin/ Explore the data: https://humanprogress.org/dataset/cholera-2/?countries=REG_517-169-REG_2290&regions=468-459