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World Diabetes Day is the primary global awareness campaign focusing on diabetes mellitus and is held on November 14 each year.
Led by the International Diabetes Federation (IDF), each World Diabetes Day focuses on a theme related to diabetes, Type 2 Diabetes is largely preventable and treatable non-communicable disease that is rapidly increasing in numbers worldwide. Type 1 Diabetes is not preventable but can be managed with insulin injections.  Topics covered have included diabetes and human rights, diabetes and lifestyle, diabetes and obesity, diabetes in the disadvantaged and the vulnerable, and diabetes in children and adolescents. While the campaigns last the whole year, the day itself marks the birthday of Frederick Banting who, along with Charles Best and John James Rickard Macleod, first conceived the idea which led to the discovery of insulin in 1922.
By 2016, World Diabetes Day was being commemorated by over 230 IDF member associations in more than 160 countries and territories, as well as by other organizations, companies, healthcare professionals, politicians, celebrities, and people living with diabetes and their families. Activities include diabetes screening programmes, radio and television campaigns, sports events and others.
Themes of previous World Diabetes Day campaigns have focused on different factors that influence the risk of diabetes and its complications: