tokens: OBJECTIVE : To determine whether activation of Epstein-Barr virus ( EBV ) replication in tumour cells of AIDS-related non-Hodgkin 's lymphoma ( ARNHL ) is correlated with CD4+ cell counts and influences antibody response to EBV [ anti-Z Epstein-Barr replicative activator ( ZEBRA ) , anti-early antigen ( EA ) , anti-viral capsid antigen ( VCA ) ] .