1 in 5 Americans Had H1N1 Swine Flu

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Updated: 10/20 11:57 am

Feb. 12, 2010 - About one in five U.S. residents -- 57 million Americans -- have had H1N1 swine flu since the pandemic began in April 2009, the CDC estimates.

Some 11,690 Americans have died of H1N1 swine flu. That's the midpoint of the CDC's estimate, which ranges from as few as 8,330 deaths to as many as 17,160.

The new estimates cover the period from April 2009 through Jan. 16, 2010; they suggest that 2 million Americans caught swine flu since Dec. 12, 2009 -- and that 530 died in that five-week period.

While the new estimates do not indicate a new pandemic wave, they do show that people continue to be sickened and even killed by the H1N1 swine flu bug.

The CDC estimates are based on mathematical models used to give a better picture of the scale of the epidemic than lab-confirmed cases.

Here are the CDC's estimates -- broken down by age group -- of how many U.S. residents have had H1N1 swine flu, been hospitalized with the disease, and died from it:


2009 H1N1


Estimated Range




0-17 years

~19 million

~13 million to ~27 million

18-64 years

~33 million

~24 million to ~49 million

65 years and older

~5 million

~4 million to ~8 million

Cases Total

~57 million

~41 million to ~84 million




0-17 years


~58,000 to ~120,000

18-64 years


~107,000 to ~221,000

65 years and older


~18,000 to ~37,000

Hospitalizations Total


~183,000 to ~378,000




0-17 years


~880 to ~1,810

18-64 years


~6,390 to ~13,170

65 years and older


~1,060 to ~2,180

Deaths Total


~8,330 to ~17,160


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