The prevalence of progressive familial heart block is unknown. In the United States, about 1 in 5,000 individuals have complete heart block from any cause; worldwide, about 1 in 2,500 individuals have complete heart block.
How many people are affected by progressive familial heart block ?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: How many people are affected by progressive familial heart block ? [/INST] \n The prevalence of progressive familial heart block is unknown. In the United States, about 1 in 5,000 individuals have complete heart block from any cause; worldwide, about 1 in 2,500 individuals have complete heart block.</s>