World diabetes day is November 14 – the birthday of Frederick
Banting, whose work with Charles Best led to the discovery of insulin
in 1921. The blue circle is the international symbol for diabetes. It
was created in 2006 to support a campaign for a United Nations
Resolution of Diabetes as a response to the growing global diabetes
pandemic. The circle symbolizes positivity, unity, and strength and
the blue reflects the color of the sky and the flag of the United Nations.