tokens: Human immunodeficiency virus-type 1 ( HIV-1 ) infection is characterized by a chronic state of immune hyperactivation in patients .
folded_tokens: human immunodeficiency virus-type 1 ( hiv-1 ) infection is characterized by a chronic state of immune hyperactivation in patients .
labels: B-virus I-virus I-virus I-virus O B-virus O O O O O O O O O B-other_name I-other_name O B-multi_cell O