Question

improvement in water sanitation can control many diseases explain with the help of example

Answer 1

by improving water sanitation we can control many diseases . for example dengue -not storing water at certain places such as coolers,buckets and so on will help not to grow mosquitoes in ones area this will be preventing dengue in the are because of water sanitation or if we take infections they are just because of not drinking proper water so we should drink pure and good water.
I think this would be enough

Answer 2

for example water pollution and contamination causes damage of liver , poor digestion , diarrhoea , cholera , dengue , meningitis ,etc. if we control water pollution and sanctification , we can get over this diseases .