“地中海贫血症”的分布，则由地中海地区延伸至西亚以及中亚各国。
The thalessemia belt passes through the Mediterranean and West and Central Asian countries.
所谓隐性遗传疾病，像“泰-萨克斯病”、“囊性纤维化”，以及被称为“地中海贫血症”的血细胞疾病，都很罕见。
So-called recessively inherited disorders, such as Tay-Sachs disease, cystic fibrosis and red blood cell disorders known as thalessemias are rare.
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