cultivation of human embryonic lung ( hel ) cells in media containing acetylsalicylic acid ( asa ) at 100 micrograms/ml and maintenance at this level after inoculation with either cell-free varicella zoster virus ( vzv ) or virus-infected cells resulted in a 2- to 4-fold increase in yields of cell-free virus released by sonication .
C0042338
varicella zoster virus
C0042776
virus