answer:I don’t think a hard number would be credible, it’s going to vary a lot from person to person (profession, travel, vaccination, etc.) and there’s no reliable reporting. Buuuut…. for the US The CDC says In the United States, each year on average 5% to 20% of the population gets the flu and more than 200,000 people are hospitalized from seasonal flu-related complications. So if that were somehow equally distributed and averaged out, you could say you’d get the flu every 10 years or so. And wikipedia says the average life expectancy in the US is 79 years. So, spread the word far and wide, it’s a statistically proven fact you will get precisely 7.9 flus in your lifetime. or your money back