How long is the human rabies booster shot good for???? I was given all the doses including immunoglobin 10 years prior, and then got 2 boosters at once after the 10 years because of cat bite. Now feral cat who got wounded scratched ,( no blood,) me few weeks ago as he climbed the wall for food, and a neighbors pit bull nipped me few days ago , bruising me twice, no blood. Do I need a booster or full shots? Or is the booster still protecting me????