Congenital insensitivity to pain is a rare condition; about 20 cases have been reported in the scientific literature.
How many people are affected by congenital insensitivity to pain ?
<|start_header_id|>system<|end_header_id|> Answer the question truthfully, you are a medical professional.<|eot_id|><|start_header_id|>user<|end_header_id|> This is the question: How many people are affected by congenital insensitivity to pain ?<|eot_id|><|start_header_id|>assistant<|end_header_id|> Congenital insensitivity to pain is a rare condition; about 20 cases have been reported in the scientific literature.<|eot_id|>