Influenza, Novel A refers to a new respiratory infection caused by a strain of *Influenza A virus* that has not previously circulated widely among humans. It can affect people of all ages globally, posing a risk for widespread outbreaks and pandemics due to limited pre-existing immunity.
Transmission methods vary. Please consult CDC or WHO resources for specific information.
Contagious Period: Varies by disease
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Global disease surveillance and guidelines from the World Health Organization
View WHO Resources →Disease information on Virus Watcher is reviewed by our Chief Epidemiologist, a former CDC lead analyst for FluSight forecasting. Outbreak data is aggregated from verified sources including BEACON, ProMED, WHO, CDC, and 50+ national health agencies. This information is for educational purposes and should not replace professional medical advice.
Last reviewed: 2026-03-04
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