There are up to 5 million cases of cholera every year . It can kill those who are n't properly hydrated . But in the developing world it 's a serious problem , with 3 to 5 million cases every year worldwide , according to the World Health Organization . Vladimir Nalin developed the first solution in 1968 .
There are up to 5 million cases of cholera every year . It can kill those who are n't properly hydrated . Vladimir Nalin developed the first solution in 1968 .