Table 1.
Case fatality of known influenza viruses
| Influenza type | Case fatality (%) |
|---|---|
| Spanish flu | 3.0 |
| A/H5N1 (avian flu) | 68.0 |
| SARS (corona) | 9.6 |
| Seasonal influenza | 0.4 |
| A/H1N1 (swine flu) | 0.1 |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.