Online Health Information Category Grows at Rate Four Times Faster Than Tota...( Category Up 21 Pe...),Health

Category Up 21 Percent in Past Year

WebMD Health Ranks as Top Publisher of Display Ads

RESTON, Va., Sept. 9 /PRNewswire-FirstCall/ -- comScore, Inc. (Nasdaq: SCOR), a leader in measuring the digital world, today released results of a study showing that the health information site category has grown 21 percent during the past year -- more than four times the growth rate of the total U.S. Internet population.

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While WebMD Health continues to lead the category with 17.3 million visitors in July (up 3 percent versus year ago), three other health networks boosted the overall growth of the category, each attracting more than ten million visitors: Everyday Health with 14.7 million (up 63 percent), Revolution Health Network with 11.3 million visitors (up 182 percent), and AOL Health with 11.1 million (up 88 percent). While Everyday Health and Revolution Health Network both achieved significant organic growth on their core Web sites, their recent partnerships with several smaller health sites, as well as some strategic acquisitions, have also contributed to their respective gains.

Top 10 Health Information Sites by Unique Visitors

July 2008 vs. July 2007

Total U.S. - Home/Work/University Locations

Source: comScore Media Metrix

Total Unique Visitors (000)

Jul-2007 Jul-2008 % Change

Total Internet: Total Audience 180,078 189,134 5

Health - Information 56,865 69,008 21

WebMD Health 16,829 17,277 3

Everyday Health 9,009 14,703 63

Revolution Health Network 4,014 11,329
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