<s>[INST] <<SYS>> This is a medical question of type : frequency <</SYS>> How many people are affected by nonbullous congenital ichthyosiform erythroderma ? [/INST] NBCIE is estimated to affect 1 in 200,000 to 300,000 individuals in the United States. This condition is more common in Norway, where an estimated 1 in 90,000 people are affected. </s>