The prevalence of LHON in most populations is unknown. It affects 1 in 30,000 to 50,000 people in northeast England and Finland.
How many people are affected by Leber hereditary optic neuropathy ?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: How many people are affected by Leber hereditary optic neuropathy ? [/INST] \n The prevalence of LHON in most populations is unknown. It affects 1 in 30,000 to 50,000 people in northeast England and Finland.</s>