Human herpesvirus 6 variant A , but not variant B , infects EBV -positive B lymphoid cells , activating the latent EBV genome through a BZLF-1 -dependent mechanism .
human herpesvirus 6 variant a , but not variant b , infects ebv -positive b lymphoid cells , activating the latent ebv genome through a bzlf-1 -dependent mechanism .
B-virus I-virus I-virus I-virus I-virus O O O B-virus I-virus O O B-virus O O O O O O O B-DNA_family_or_group B-virus O O O B-protein_molecule O O O