NHA Certified Clinical Medical Assistant (CCMA)Clinical Patient CareEasy
A medical assistant is preparing to administer an influenza vaccine to an adult patient. The MA should administer this vaccine via which route?
- ASubcutaneous (SubQ)
- BIntradermal (ID)
- CIntramuscular (IM)
- DIntravenous (IV)
Show answer & explanationAnswer & explanation
Correct answer: C. Intramuscular (IM)
Most influenza vaccines are administered intramuscularly (IM) in adults to ensure proper absorption and immune response, typically into the deltoid muscle.
Why the other options are wrong
- A. Subcutaneous injections are used for some vaccines (e.g., MMR, varicella) or insulin, but not the standard influenza vaccine.
- B. Intradermal injections are typically used for allergy testing or TB skin tests, not standard influenza vaccines (though some specific ID flu vaccines exist, IM is the most common route).
- D. Intravenous injections are for direct entry into the bloodstream and are not used for vaccines.
Influenza Vaccine Route
The standard route for administering the influenza vaccine to adults is intramuscular (IM), typically into the deltoid muscle.
- IM route is standard for most flu vaccines.
- Deltoid muscle in adults.
- Ensures optimal immune response.
- Specific formulations (e.g., intradermal, nasal) exist but IM is most common.
Memory trick: Flu Shot: Into the Muscle, For Sure!