About 10,400 people in the UK, 30,000 people in the US, and 70,000 people worldwide have CF.[5][6] The incidence among white people is about 1/3000; the incidence is lower among people of African, Hispanic, and Asian descent. It is most common among people of European descent.[7] One study suggests that the incidence may be decreasing since the institution of newborn screening.[8] Lung disease is the most common cause of morbidity and mortality.

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