<s>[INST] <<SYS>> This is a medical question of type : frequency <</SYS>> How many people are affected by anhidrotic ectodermal dysplasia with immune deficiency ? [/INST] The prevalence of the X-linked recessive type of EDA-ID is estimated to be 1 in 250,000 individuals. Only a few cases of the autosomal dominant form have been described in the scientific literature. </s>