Influenza due to unidentified influenza virus
This condition is a respiratory illness caused by an influenza virus that has not yet been specifically identified by laboratory testing.
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Find PulmonologistsClinical Overview
Influenza due to an unidentified virus, coded as J11, is a contagious respiratory infection that affects your nose, throat, and lungs. Because we have not yet pinpointed the exact strain through a lab test, we classify it as 'unidentified' while still treating the symptoms of the flu.
It happens when tiny virus particles enter your system through the air when someone coughs or sneezes, or by touching surfaces contaminated with the virus. Your body then reacts with inflammation in your airways, leading to the classic feeling of being run down.
Common Symptoms
- Sudden onset of high fever or feeling feverish
- Severe muscle or body aches
- Extreme tiredness or fatigue
- A dry, hacking cough
- Headache
- Stuffy or runny nose
- Sore throat