Abstract:Background: HSP is typically a disease of children between the ages of 3 and 10 years. Although adult cases have been described, 50% of all cases occur at or before the age of 5 years. Males are affected twice as often as females. In North America, Caucasians have the highest prevalence, and African Americans have the lowest prevalence. Although the cause of HSP is unknown, it commonly follows an upper respiratory tract infection. As a result, the disease is more common in winters.
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