FACTBOX: U.S. estimates 22 million had swine flu, 3,900 dead

(Reuters) - New estimates suggest the pandemic of H1N1 flu is far worse than an average influenza season, with at least 22 million infections and 3,900 deaths, according to the U.S. Centers for Disease Control and Prevention.

The new estimates are extrapolations based on detailed data for April-October from 10 states and do not reflect a worsening of the pandemic, the CDC stressed. Following are the figures released by the agency, with the median number of cases followed by the full potential range:

ESTIMATED CASES BY AGE

* 0-17 years - 8 million estimated cases, with a range of 5 million to 13 million

* 18-64 years - 12 million estimated cases, range 7 million to 18 million

* 65 and older - 2 million estimated cases, range 1 million to 3 million

* Total cases - 22 million, range 14 million to 34 million

ESTIMATED HOSPITALIZATIONS

* 0-17 years - 36,000 hospitalizations, with an estimated range from 23,000 to 57,000

* 18-64 years - 53,000 hospitalizations, range 34,000 to 83,000

* 65 and older - 9,000 hospitalizations, range 6,000 to 14,000.

* Total hospitalizations - 98,000, range 63,000 to 153,000

ESTIMATED DEATHS

* 0-17 years - 540 deaths with a potential range of 300 to 800.

* 18-64 years - 2,920 deaths, range 1,900 to 4,600

* 65 years and older - 440 deaths, range 300 to 700

* Total deaths - 3,900 deaths, range 2,500 to 6,100. Source: CDC here