<s>[INST] <<SYS>> This is a medical question of type : frequency <</SYS>> How many people are affected by autoimmune polyglandular syndrome, type 1 ? [/INST] Autoimmune polyglandular syndrome, type 1 is thought to be a rare condition, with about 500 cases reported worldwide. This condition occurs more frequently in certain populations, including Iranian Jews, Sardinians, and Finns. </s>