X-linked hyper IgM syndrome is estimated to occur in 2 per million newborn boys.
How many people are affected by X-linked hyper IgM syndrome ?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: How many people are affected by X-linked hyper IgM syndrome ? [/INST] \n X-linked hyper IgM syndrome is estimated to occur in 2 per million newborn boys.</s>