Infection with a variant of simian immunodeficiency virus , SIVsmmPBj14 , leads to severe acute disease in macaques .
infection with a variant of simian immunodeficiency virus , sivsmmpbj14 , leads to severe acute disease in macaques .
O O O O O B-virus I-virus I-virus O B-virus O O O O O O O B-multi_cell O