Answer: inoculated

AnswerCrossword Clue
INOCULATEDUsed a syringe on
inoculatedINOCULATE, to introduce (eg bacteria, a virus) into an organism
inoculatedIntroduce (cells or organisms) into a culture medium
inoculatedIntroduce (an infective agent) into an organism
inoculatedTreat (a person or animal) with a vaccine to produce immunity against a disease