Oral rehydration therapy
The therapy was developed in the second half of the 20th century. It has helped lower the number of human deaths from dehydration in vomiting and diarrheal illnesses, especially in cholera epidemics occurring in children. It is sign for public health getting better all over the world. It is on the World Health Organization's List of Essential Medicines, a list of the most important medication needed in a basic health system.