merck sharp & dohme (israel - 1996) company ltd, israel - live attenuated oka/merck strain of varicella-zoster virus - אבקה וממס להכנת תרחיף להזרקה - live attenuated oka/merck strain of varicella-zoster virus 19400 pfu / 0.65 ml - zoster, live attenuated - zoster, live attenuated - zostavax is a live attenuated virus vaccine indicated for prevention of herpes zoster (shingles) in individuals 50 years of age and older.