Purine nucleoside phosphorylase deficiency is rare; only about 70 affected individuals have been identified. This disorder accounts for approximately 4 percent of all SCID cases.
How many people are affected by purine nucleoside phosphorylase deficiency ?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: How many people are affected by purine nucleoside phosphorylase deficiency ? [/INST] \n Purine nucleoside phosphorylase deficiency is rare; only about 70 affected individuals have been identified. This disorder accounts for approximately 4 percent of all SCID cases.</s>