More people living in less space can put greater strain on already limited sanitation resources, and this can create a fertile breeding ground for waterborne infectious disease and the insects spreading them.
This is an industry that doesn't have the common cold... It has cholera.
I'm a little thirsty, can I go drink out of your toilet?
Typhoid and swans - it all comes from the same place.
My secret is one the world needs to know - nearly a billion people a year die from unsafe drinking water.
Contaminated food is a major cause of diarrhea, substantially contributing to malnutrition and killing about 2.2 million people each year, most of them children.
If anything, all homes should have piped water supply and sanitation, which could improve public-health indicators and reduce infant mortality.
