The prevalence of hypomyelination and congenital cataract is unknown.
How many people are affected by hypomyelination and congenital cataract ?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: How many people are affected by hypomyelination and congenital cataract ? [/INST] \n The prevalence of hypomyelination and congenital cataract is unknown.</s>