PUBLIC HEALTH
Influenza seasonal strains
Influenza seasonal strain tree
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CASE ANALYSIS
Scenario
A public-health presentation needs a simple seasonal strain comparison.
Key decisions
- Season labels: Include the strain subtype and season.
- Clades: Highlight H1N1 and H3N2 separately.
- Time scale: State the reference year on the chronogram.
When to reuse this
Use this as an illustrative communication aid; surveillance conclusions need source data and analysis.
FAQ
Frequently asked questions
What does the seasonal label show?
It identifies the subtype and year used for each selected strain.
Why use a chronogram?
A chronogram makes the time framing of a strain comparison explicit.
Is this surveillance evidence?
No. It is an illustrative example and does not replace a sourced surveillance analysis.
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phylo-influenza-seasonal-strains