In 2000, 70% of the population had access to safe drinking water and 21% had adequate sanitation. A comprehensive government health program treats such diseases as leprosy, sleeping sickness, malaria, filariasis, intestinal worms, and tuberculosis. Rates for immunization of children under the age of one were 97% for tuberculosis and 65% for polio. Immunization rates for DPT and measles were 37% and 56% respectively. Gabon has a domestic supply of pharmaceuticals from a factory in Libreville.