Mosquito borne diseases, particularly malaria and dengue fever, were both prevalent in Burma before the storm, and their risk is now compounded by huge numbers of people sleeping outside and surrounded by water; more than 80% of malaria cases in Burma are P. falciparum, the most deadly form of the disease. Food borne diseases, from eating poor quality, old, or spoiled food, are also a potential health risk which is compounded by the lack of cooking fuel and equipment among much of the affected population.