Death rate iso lines:
| color | rate | notes | 
|---|---|---|
| light blue | 0.1% | Influenza A | 
| green | 0.4% | |
| blue | 1% | |
| grey | 2.25% | Spanish Flue (1918) | 
| red | 4% | |
| purple | 11% | SARS | 
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