# A nurse is assessing a 45-year-old patient who was admitted with suspected influenza. Which assessment finding would be most indicative of influenza rather than a common cold?

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> url: https://mymerci.kr/pages/nclex_q.php?qn_id=541864  
> language: ko  
> subject: Adult Health

## 문제

A nurse is assessing a 45-year-old patient who was admitted with suspected influenza. Which assessment finding would be most indicative of influenza rather than a common cold?

## 보기

1. Gradual onset of symptoms over 3-4 days
2. Mild nasal congestion with clear rhinorrhea
3. Low-grade fever of 100.2°F (37.9°C)
4. Sudden onset of high fever with severe myalgia **✔ 정답**

**정답: 4**

## 해설

Influenza is distinguished by sudden onset of high fever (>101°F/38.3°C) with severe myalgia, unlike the gradual onset and milder symptoms of a common cold. Other options represent typical cold symptoms.

## 심화 해설

Clinical Judgment
This question evaluates the core clinical judgment needed to differentiate between the common cold and influenza. A cold typically presents with gradual onset of upper respiratory symptoms (nasal congestion, runny nose, sore throat) and mild systemic symptoms. In contrast, influenza is characterized by sudden onset, high fever (usually >101°F/38.3°C), and severe myalgia and fatigue. Option 4 includes all three of these key elements, making it the critical cue that best indicates influenza.

Memory Tip: The mnemonic to distinguish influenza from a cold is "**S**udden, **S**evere, **S**ystemic." If symptoms are sudden, severe, and systemic, suspect influenza.

KR vs US: In Korea, the term 'dog gam' (flu) is sometimes used interchangeably for influenza and the common cold, but in US clinical settings, they are clearly distinguished. In particular, when influenza is suspected, prompt administration of antivirals (e.g., Oseltamivir) and isolation precautions (airborne + droplet isolation) are emphasized.

## 임상 시나리오

Clinical Practice Guide
When evaluating a patient suspected of having influenza, be sure to check for "sudden high fever + severe muscle pain/fatigue." This is the biggest difference from a cold. Also, difficulty breathing, chest pain, persistent high fever, and changes in consciousness can be signs of complications such as pneumonia or encephalitis, so you must report immediately (Notify HCP!).
Caution: In SATA (Select All That Apply) questions, traps often include symptoms that start gradually or involve only low fever as "characteristics of influenza." Focus on the "severity of systemic symptoms."

## 핵심 개념

- **Influenza** — An acute respiratory infectious disease caused by the influenza virus. It is characterized by systemic symptoms such as sudden high fever, severe muscle pain, headache, and fatigue.
- **Myalgia** — Muscle pain. A common symptom of influenza, accompanied by severe body aches.
- **Rhinorrhea** — Runny nose. A condition in which secretions from the nasal mucosa increase and flow out of the nose. It is a more prominent symptom in colds.
- **Sudden Onset** — Sudden onset. This means symptoms appear clearly within hours to a day, and it is an important characteristic of influenza.
- **Systemic Symptoms** — Systemic symptoms. Refers to symptoms that affect the entire body, such as fever, chills, muscle aches, fatigue, and headache. They appear more severely in influenza than in the common cold.

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