Zebra print ribbon

Lore & Background

The zebra has been used as a symbol for rare diseases since around 1940. Dr. Theodore Woodward, a professor at the University of Maryland's School of Medicine, used the term to teach students the basics of diagnosing disease: 'When looking at a patient's symptoms, it is better to assume it is a common ailment, not a rare one – a horse rather than a zebra.' This metaphor underlies the zebra print ribbon's meaning.

National Rare Disease Day (also known as Rare Disease Awareness Day) is held on February 29, but is moved up a day to February 28 on non-leap years. This day was launched by the European Organization for Rare Diseases in 2008 and is now recognized worldwide. The date of February 29 was chosen because it is a 'rare day' due to the leap year.

In the US, the National Organization for Rare Disorders brings to light rare diseases, listing and defining more than 1,200 rare diseases that fall under the zebra awareness ribbon. One of the rare diseases on the list is neuroendocrine tumors, which have been diagnosed in only 2% of cancers in the US. Whipple's disease, another rare disease, is a bacterial infection often mistaken for other diseases, requiring a biopsy of the stomach or duodenum looking for the bacteria Tropheryma whipplei.

Reader's Guide

The zebra print ribbon serves as a unifying symbol for the estimated thousands of rare diseases, many of which lack dedicated awareness campaigns. Its origin in a medical teaching maxim—prioritizing common diagnoses over rare ones—highlights the diagnostic challenges faced by patients with rare conditions. The ribbon's association with National Rare Disease Day, launched in 2008 by the European Organization for Rare Diseases, has helped bring global attention to these often-overlooked illnesses. In the United States, the National Organization for Rare Disorders uses the ribbon to represent over 1,200 rare diseases, including neuroendocrine tumors (which account for only 2% of US cancers) and Whipple's disease (a bacterial infection requiring specific biopsy for diagnosis). The ribbon also specifically represents Ehlers–Danlos syndromes, a group of genetic connective tissue illnesses. By providing a common visual identifier, the zebra print ribbon fosters solidarity among rare disease communities and underscores the need for continued research, accurate diagnosis, and patient support.

Did You Know?

• National Rare Disease Day is held on February 29, but moves to February 28 on non-leap years because it is a 'rare day'.
• The zebra print ribbon represents all rare diseases, not just rare cancers or specific conditions.