the inhibitory effects of interferon ( if ) on the replication of varicella-zoster ( vz ) virus in human foreskin fibroblast ( hff ) cultures inoculated with infected cells or with cell-free virus were assayed by measuring ( 1 ) yields of infected cells , ( 2 ) plaques , ( 3 ) microfoci and ( 4 ) cytopathic effects .
C0042338
varicella-zoster
C0042776
virus