World Diabetes Day
<p>On the night of 31 October 1920, the London, Ontario surgeon Frederick Banting woke with an idea scrawled in his notebook about isolating the internal secretion of the pancreas. The following summer, working in a Toronto laboratory with the medical student Charles Best under the direction of John Macleod, he turned that idea into the extract we now call insulin; in January 1922 a dying fourteen-year-old, Leonard Thompson, became the first person treated with it and lived. World Diabetes Day falls on 14 November, Banting’s birthday, and that date is no accident — it ties the world’s largest diabetes awareness campaign directly to the discovery that turned a fatal diagnosis into a manageable one.</p>
<h2 id="where-the-day-comes-from">Where the day comes from</h2><div class="ad-unit ad-in-article" aria-label="Advertisement">
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<p>The day itself is younger than the discovery it honours. It was created in 1991 by the International Diabetes Federation and the World Health Organization, in response to alarm at the rising global incidence of diabetes. For its first fifteen years it ran as a campaign of the diabetes community rather than an official international observance.</p>
<p>That changed in December 2006, when the United Nations General Assembly adopted resolution 61/225, recognising diabetes as a chronic disease that threatens public health and designating 14 November as a United Nations day from 2007 onwards. It was one of the few times the UN had singled out a non-communicable disease in this way, a measure of how sharply the condition’s spread had registered. The following year the blue circle logo was introduced as part of the “Unite for Diabetes” campaign that had pushed for UN recognition.</p>
<h2 id="history">History</h2>
<p>The discovery story is more tangled, and more human, than the tidy “Banting and Best” shorthand suggests. The 1923 Nobel Prize in Physiology or Medicine went to Banting and Macleod — not Best — a decision that infuriated Banting, who shared his half of the prize money with Best; Macleod in turn shared his with the biochemist James Collip, whose purification work made the extract safe enough to inject into humans. The four did not always get on, and the credit dispute has never been fully resolved, but the outcome was unambiguous: in 1922 the University of Toronto sold the patent for one dollar, on the principle that a discovery this important should not be anyone’s private fortune.</p>
<p>The effect was immediate and visible. Before insulin, a child diagnosed with what is now called type 1 diabetes faced near-certain death within months, often managed only by starvation diets that bought a little time at terrible cost. The Toronto team’s extract reversed this overnight; photographs from the early 1920s show emaciated children restored to health within weeks. A century later, the irony the day increasingly confronts is that insulin’s affordability — guaranteed by that dollar patent — has eroded, and access to the medicine remains uneven even where it was invented to be cheap.</p>
<h2 id="why-it-matters">Why it matters</h2><div class="ad-unit ad-in-article" aria-label="Advertisement">
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<p>Diabetes is a failure of blood-sugar regulation: the body either cannot make enough insulin or cannot use it properly. Unmanaged, raised blood sugar quietly damages the heart, kidneys, eyes, nerves and circulation, and is a leading cause of blindness, kidney failure and lower-limb amputation. The International Diabetes Federation’s Diabetes Atlas estimates that hundreds of millions of adults now live with the condition, and a large share of them are undiagnosed — carrying it without knowing.</p>
<p>That last point is the day’s strongest argument for awareness. Type 2 diabetes in particular can develop for years with few obvious symptoms, so that the first sign is often a complication that need never have happened. Spreading knowledge of the risk factors and warning signs brings people to diagnosis sooner, and earlier diagnosis is the single most effective lever for preventing the disease’s long-term harm. Concern for the body’s slow, hidden damage is a theme the day shares with <a href="/specialdate/world-digestive-health-day/">World Digestive Health Day</a> and with the liver-focused <a href="/specialdate/who-world-hepatitis-day/">WHO World Hepatitis Day</a>, both of which likewise turn on catching trouble before symptoms force the issue.</p>
<p>The scale of the problem is also a story about how the world has changed since 1991. When the campaign began, diabetes was still often thought of as a disease of affluent, ageing Western populations. That picture has been overturned. The sharpest increases now occur in low- and middle-income countries, driven by urbanisation, changing diets and reduced physical activity, and the condition is appearing at younger ages than before. The IDF’s projections suggest the number of adults living with diabetes will rise by hundreds of millions over the coming decades unless the trend is checked. This is why the day’s themes have shifted away from treatment alone and towards prevention, education and the structural conditions — cheap processed food, car-dependent cities — that make type 2 diabetes so much more common than it was a generation ago.</p>
<h2 id="how-it-is-marked">How it is marked</h2>
<p>Each year the IDF sets a theme — recent campaigns have centred on access to care, diabetes education, and the wellbeing of those living with the condition. The most visible tradition is the illumination: on 14 November landmarks from Toronto’s CN Tower to the Sydney Opera House and the fountains of Geneva are lit in blue, the campaign’s colour.</p>
<p>People are encouraged to wear blue, to form human “blue circles”, and to take part in screening events, walks and talks run by health services, charities and community groups. Because much of the condition’s burden is preventable or manageable through diet, activity and monitoring, the day leans heavily on practical advice. It also serves as an advocacy occasion, pressing governments on the price and supply of insulin and monitoring equipment — a cause that connects naturally to the wider machinery of public health expressed in observances such as <a href="/specialdate/who-world-health-day/">WHO World Health Day</a>.</p>
<h2 id="variations-across-the-world">Variations across the world</h2>
<p>Marked in more than 160 countries, the day takes on local colour. In Canada, insulin’s birthplace, it carries an extra note of national pride, and Banting House in London, Ontario — the home where he had his 1920 brainwave — is a focal point. In India, which has one of the largest diabetic populations of any country, the day drives mass screening drives and campaigns against the sugar-heavy diets and sedentary urban lifestyles fuelling the rise of type 2. In sub-Saharan Africa the emphasis often falls on access, where the cost of insulin and the scarcity of refrigeration to store it remain matters of life and death. The same blue circle, then, signifies a celebration of medical heritage in one country and a fight for basic supply in another.</p>
<h2 id="symbols-and-what-they-mean">Symbols and what they mean</h2>
<p>The blue circle, adopted in 2007, is the day’s defining emblem. Its meaning is deliberate: the circle is found in many cultures as a sign of life and health and conveys unity, while the blue echoes the sky that arches over every nation and the colour of the UN flag — a nod to the global recognition the campaign had just won. Lighting monuments in blue and forming human circles extend the same symbol into the physical world, turning a logo into a public act. There is a neat logic to the shape, too: a circle has no beginning and no end, which suits a condition that, for now, has no cure and must be lived with day after day rather than defeated once and put behind you.</p>
<h2 id="fun-facts">Fun facts</h2>
<ul>
<li>The date is Frederick Banting’s birthday, 14 November; he was 29 when he had the idea that led to insulin and remains one of the youngest Nobel laureates in medicine.</li>
<li>The University of Toronto sold the insulin patent for a single dollar in 1922, so that no one could profit from a treatment millions would depend on — a decision often contrasted with modern insulin prices.</li>
<li>The 1923 Nobel Prize sparked a feud: Banting shared his prize money with the overlooked Charles Best, and Macleod shared his with James Collip, the chemist who made the extract safe to use.</li>
<li>World Diabetes Day became, in 2006, one of the very few non-communicable diseases ever to be granted its own official United Nations day by General Assembly resolution.</li>
<li>The blue circle was chosen partly because, unlike the awareness ribbon used by many causes, a circle could not easily be claimed or confused — giving diabetes a distinct global mark.</li>
</ul>
<h2 id="a-closing-reflection">A closing reflection</h2>
<p>It is worth dwelling on what the choice of Banting’s birthday actually commits the day to. A birthday is a celebration of a beginning, and insulin’s beginning was a genuine triumph — one of the rare moments when a laboratory result reached a dying child within months rather than decades. Yet the day refuses to rest there. The same campaign that lights towers blue spends its political capital arguing that the dollar patent’s promise has been broken, that a medicine invented to be cheap has become, for too many, out of reach. To honour a discovery honestly is to ask whether we have kept faith with the people it was meant to save — and on that question, a hundred years on, the answer is still being written.</p>
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