6 Sickened on Vegas Strip
"Each year, between 8,000 and 18,000 Americans are hospitalized with Legionnaires' disease, according to the CDC. It tends to erupt during the summer and early fall months, and its fatality rate ranges from 5 to 30 percent. "
So each year we have between 400 and 5,400 fatalities depending on whether you use 8K or 18K or 5% or 30%. The CDC is a little loose with their stats.