Hindustan - Hindustan is derived from the Persian word Hindu, which is itself is derived from Sindhu, Sanskrit for the Indus River. Sindhu is a river in Sanskrit, in Persian it becomes Hindu. This together with a popular suffix -stān (Sanskrit and Old Persian 'sthāna', meaning place) gave birth to the word Hindustan, which was rendered as Hindusthan. Literally, the word means land of the Hindus.

Diarrhea -  (from the Greek, διὰρροια meaning "a flowing through"), also spelled diarrhoea, is the condition of having three or more loose or liquid bowel movements per day. It is a common cause of death in developing countries and the second most common cause of infant deaths worldwide. The loss of fluids through diarrhea can cause dehydration and electrolyte imbalances. In 2009 diarrhea was estimated to have caused 1.1 million deaths in people aged 5 and over and 1.5 million deaths in children under the age of 5.Oral rehydration salts and zinc tablets are the treatment of choice and have been estimated to have saved 50 million children in the past 25 years.

Hindustan tried to lower the levels of Diarrhea in their area. I suppose the have found the cause if the hygiene of their people. This is where cleanliness kicks in. If we are always clean the gives us a lesser chance of catching diseases. This should be the main reason why people should always wash their hands and be careful of what the eat or put in their mouth. You will never know what virus you'd be receiving and your body might not be able to fight of these viruses.