# An infant needs multiple intramuscular vaccines. The first injection has been given at the marked site. The nurse plans a second injection in the same anterolateral thigh, keeping sites at least 1 inch (2.54 cm) apart when possible. Click the candidate that satisfies both location and separation requirements.

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> url: https://mymerci.kr/pages/nclex_q.php?qn_id=581202&lang=en  
> language: en  
> subject: Health Promotion and Maintenance  
> category: HPM

## Question

An infant needs multiple intramuscular vaccines. The first injection has been given at the marked site. The nurse plans a second injection in the same anterolateral thigh, keeping sites at least 1 inch (2.54 cm) apart when possible. Click the candidate that satisfies both location and separation requirements.

![](https://mymerci.kr/data/nclex/hotspot/regen_20260908_2350/HSR539.svg)

## Explanation

C is in the middle third of the shown muscle and approximately 2.8 cm from the first injection.

## In-depth explanation

Quick answer
C. C is in the middle third of the shown muscle and approximately 2.8 cm from the first injection.
Why this is the best choice
Use both the muscle boundary and the ruler. C is about 140 pixels distal and 15 pixels lateral to the first point; at 50 pixels/cm, the distance is approximately 2.82 cm. The other distant points are outside the appropriate depicted area.
Clinical picture
The observations are fictional teaching data. Apply the stated context; the selected feature does not by itself replace a complete bedside assessment.
Memory hook
Adequate separation does not compensate for an inappropriate injection location.
Decision rule
Adequate separation does not compensate for an inappropriate injection location.
Why the other regions do not fit
A is only 1 cm from the first injection. B is outside the muscle and lateral to the drawn thigh. D is below the middle third even though it is far enough away.
**Sources**
- For multiple injections, separate sites by at least one inch if possible; infant IM vaccines use the anterolateral thigh.

## Key concepts

- **Injection spacing within the appropriate muscle region** — Adequate separation does not compensate for an inappropriate injection location.
- **Comparison with context** — D provides ample spacing but is outside the middle-third region; A is correctly situated but too close.

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