Diabetes is a disease with a fascinating history and one that has been growing dramatically with urbanization. According to the World Health Authority, it now affects 4.6% of adults over 20, reaching 30% in the over 35s in some populations. It is one of the most serious and widespread diseases today. But the general perception of diabetes is quite different. At the beginning of the 20th century, diabetes sufferers mostly tended to be middle-aged and...