Analyze three factors that cause many endemic diseases to spread in the developing world.

A lack of safe water, inadequate excreta disposal facilities, poor hygiene, poor living conditions and unsafe food can all cause diarrhoeal diseases. These diseases are a major cause of suffering and death in an emergency situation.

Climate can affect disease transmission in a variety of ways. The distribution and population size of disease vectors can be heavily affected by local climate. Flooding after heavy rains can result in sewage overflow and widespread water contamination. In addition, there is some evidence to suggest that pathogens can be spread from one region to another along air streams or by wind.

Many endemic diseases in the developing world are waterborne. These diseases are spread by a lack of access to clean, safe drinking water and sanitation services. Many governments of developing nations are unable to provide these services. Some nations in the developing world also face the obstacle of low levels of literacy. Low levels of literacy produce fewer trained healthcare workers and fewer economic resources to attract healthcare providers. Finally, many people living in developing nations lack the economic resources to pay for basic healthcare services.

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