There are 25 physicians and 11 nurses per 100,000 population. Most rural areas have no access to health care, making residents susceptible to otherwise treatable diseases. Deficient sanitation systems, poor nutrition, and inadequate health services have pushed Haiti to the bottom of the World Bank’s rankings of health indicators. According to the United Nations World Food Programme, 80 percent of Haiti’s population lives below the poverty line. Consequently, malnutrition is a significant problem. Half the population can be categorized as “food insecure,” and half of all Haitian children are undersized as a result of malnutrition. Less than half the population has access to clean drinking water, a rate that compares poorly even with other less-developed nations.