Answer: vaccine

AnswerCrossword Clue
VACCINEShot in the arm, perhaps
VACCINEShot, perhaps
VACCINEHypodermic filler, at times
VACCINEShot contents
VACCINELaboratory preparation.
VACCINEPublic health weapon
VACCINEFlu forestaller
VACCINESalk's claim to fame
VACCINEBig shot?
VACCINEMedical breakthrough
vaccinesubstance injected into the bloodstream to give immunity from infection
vaccinea preparation given to produce immunity to a specific disease