Sensitivity to vitamin B12 concentrate.
D000707:Anaphylaxis; D000740:Anemia; D000752:Anemia, Pernicious; D045728:Corrinoids; D006801:Humans; D006967:Hypersensitivity; D014805:Vitamin B 12
D045728:Corrinoids; D014805:Vitamin B 12
ANAPHYLAXIS AND ALLERGY; ANEMIA, PERNICIOUS; VITAMIN B12