The amount of a 2'-5'-oligoadenylate synthase 1 (human) when measured in cerebrospinal fluid. The trait is level of 2'-5'-oligoadenylate synthase 1 (human) in cerebrospinal fluid (Ontology of Biological Attributes entry OBA_2056607). Also known as: cerebrospinal fluid 2'-5'-oligoadenylate synthase 1 (human) amount.