The main risk to health in Liberia is malaria. The director of the Army Medical Corps has stated that systematic use by Defence Forces personnel of anti-malaria medication should be effective in protecting them from this disease. Troops are being fully immunised against all other known disease risks, including yellow fever, hepatitis A and B, cholera, meningitis and tetanus. The director of the Medical Corps has also had detailed consultations with the Royal College of Surgeons regarding the tropical disease aspects of the mission. In addition, special training is being provided by the Netherlands to our medical personnel on the environmental health issues arising in a tropical setting. As regards possible water-borne parasites or diseases, the Defence Forces are bringing their own water purification and sewage treatment plants with them. On return from a mission, all troops are fully tested from a health perspective as a matter of course.