There are two types of diabetes mellitus, related to insulin which regulates our blood sugar levels. Having type 1 diabetes means that you are unable to produce enough insulin, so you need to inject insulin to survive. The more common type 2 diabetes is when insulin cannot be used properly by the body - this type can often be managed through diet and tablets. It can occur during pregnancy.
The highest diabetes prevalence is in North America. Of the total North American cases, 4% are in Canada, 33% are in Mexico, and 62% are in the United States. The largest population of diabetics in 2001 was in India: 56 million people.