I'm just a layman, but it looks like 33% might actually be the mortality rate. The WHO[1] and CDC[2] both report a case fatality rate over 50%.

From the Wikipedia article Human mortality from H5N1[3]:

> Public health officials in Ontario, Canada argue that the true case-fatality rate could be lower, pointing to studies suggesting it could be 14-33%, and warned that it was unlikely to be as low as the 0.1–0.4% rate that was built into many pandemic plans.

Scary.

[1]: https://www.who.int/publications/m/item/cumulative-number-of...

[2]: https://www.cdc.gov/flu/avianflu/spotlights/2022-2023/h5n1-t...

[3]: https://en.wikipedia.org/wiki/Human_mortality_from_H5N1

6% and 4% for Covid and Influenza respectively. So 33% seems insanely high to me.