There are 3 to 5 million cases of cholera every year . This idea had been around before . The WHO says that the disease is caused by a bacterium called Vibrio cholerae. David Nalin developed the rehydration solution in 1968 .
There are 3 to 5 million cases of cholera every year . The WHO says that the disease is caused by a bacterium called Vibrio cholerae. David Nalin developed the rehydration solution in 1968 .