23. 与家庭分离的无人陪伴移民儿童是所有移民人口中最脆弱的群体；缺少有关其情况的信息是机构和国家有效保护其权利遇到的最大困难之一。
23. Unaccompanied migrant children separated from their families are the most vulnerable group among all migrants; the lack of information about their situation is one of the most important barriers experienced by institutions and States preventing effective protection of their rights.