INS and type 1 diabetes mellitus: However, as in Nigeria, where the patient still has to pay 72% of the cost on drug prescription, the most expensive aspect of the problem stands at 62%, followed by transportation and laboratory tests, which run about 7% of the total cost to the individual.[64] While in the Africa region of the World Diabetes Federation, none of the countries has a 100% access to insulin for its people, in the Democratic Republic of the Congo, where the population shows a high rate of type 1 diabetes, insulin is less than 25% of the times accessible [Table 2].