A nurse is preparing to administer a MMR vaccine to a 35-year-old male. The nurse should

  • swab and clean an area of skin over the dorsogluteal muscle.
  • prepare a 25-gauge, 1 1/2-inch needle.
  • pinch and hold the skin while injecting the needle.
  • inject the needle at a 90-degree angle.
Number 3 is correct.
The MMR vaccine is administered subcutaneously. It can be administered over the triceps using a 23- to 35-gauge, 5/8-inch needle. The skin should be pinched and the needle inserted at a 45-degree angle to avoid injecting into the muscle.