Prevalence and Incidence of Stevens-Johnson Syndrome

Stevens-Johnson Syndrome: Rare Disease

Stevens-Johnson Syndrome is listed as a "rare disease" by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH). This means that Stevens-Johnson Syndrome, or a subtype of Stevens-Johnson Syndrome, affects less than 200,000 people in the US population.

Ophanet, who are a consortium of European partners, currently defines a condition rare when if affects 1 person per 2,000. They list Stevens-Johnson Syndrome as a "rare disease". More information about Stevens-Johnson Syndrome is available from Orphanet

About prevalence and incidence statistics:

The term 'prevalence' of Stevens-Johnson Syndrome usually refers to the estimated population of people who are managing Stevens-Johnson Syndrome at any given time. The term 'incidence' of Stevens-Johnson Syndrome refers to the annual diagnosis rate, or the number of new cases of Stevens-Johnson Syndrome diagnosed each year. Hence, these two statistics types can differ: a short-lived disease like flu can have high annual incidence but low prevalence, but a life-long disease like diabetes has a low annual incidence but high prevalence. For more information see about prevalence and incidence statistics.

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