Ummmm..
2,000,000,000 * .02 = 40,000,000
So overall ~ 2% of the population died from bird flu.
If 2 in 10,000 died out of a 2 Billion population then you would have:
(2,000,000,000 / 10,000) * 2 = 400,000
Looks like I need to write a letter to Dr. Ira.