Press Release

Online Health Information Category Grows 12 Percent in Q1 2007

Versus Last Year to More Than 55 Million Visitors per Month
WebMD Leads Category with 17 Million Monthly Visitors
While Upstart Health Portals Flex Their Muscles

RESTON, VA, May 21, 2007 – comScore, a leader in measuring the digital world, today released the results of a study on consumer usage of online health information resources. During the first quarter of 2007, the health information category reached an average of 55.3 million monthly U.S. visitors (31 percent of the total U.S. Internet audience), an increase of 12 percent versus the same period last year. WebMD Health led the category with an average of 17.1 million unique visitors per month in Q1 2007 (up 25 percent), followed by with 9.8 million (up 8 percent), MSN Health with 8.1 million (up 1 percent), and Yahoo! Health with 6.7 million (up 83 percent).

Top 10 Online Health Portals
Q1 2007 vs. Q1 2006
Total U.S. – Home/Work/University Locations
Source: comScore Media Metrix
Property Average Monthly Unique Visitors (000)
Q1 2006 Q1 2007 Percent Change
Total U.S. Internet Population 169,728 176,195 4%
Health - Information 49,473 55,260 12%
WebMD Health 13,700 17,114 25% 9,061 9,816 8%
MSN Health 7,951 8,068 1%
Yahoo! Health 3,642 6,671 83%
Everyday Health 4,135 6,421 55% Health 5,177 5,827 13% 4,032 4,072 1%
AOL Health 2,070 3,659 77% 725 2,674 269% 1,206 2,586 114%

Several smaller players have also gained traction in the category during the past year. In Q1 2007, attracted an average of 2.7 million visitors, up 269 percent versus last year, while jumped 114 percent to 2.6 million visitors. Meanwhile, recent market entrant has seen its traffic more than double from 239,000 visitors in January to 486,000 visitors in March.

“While the larger and more established health portals are continuing to grow, the category is being shaken up by a few upstarts,” said Carolina Petrini, vice president of pharmaceutical solutions at comScore. “In the past year, both and have more than doubled their respective online audiences to nearly 3 million visitors per month, becoming major players in the category. In addition, comes in with high expectations, so it will be interesting to monitor its ability to compete against the top sites.”

Online Health Portals Users are Loyal to their Primary Site

Generally speaking, online health portals elicit a high degree of user loyalty, as evidenced by the low degree of cross-visitation that occurs within the category. Among the top health portals, MSN Health had the highest user loyalty with just 16.8 percent of its audience visiting other health portals, followed by Yahoo! Health (17.1 percent) and (20.0 percent).

Overlap Amongst Top Health Portals
Q1 2007
Total U.S. – Home/Work/University Locations
Source: comScore
Site Percent of Site Audience Visiting Any other Site in Category
 MSN Health 16.8%
 Yahoo! Health 17.1% 20.0% 22.2%
 Everyday Health 22.2% 23.0%
 AOL Health 23.9%
 WebMD Health 28.5% Health 33.7% 36.8%

Health-Related Search Activity Drives Substantial Traffic

One of the key drivers of traffic to the online health information category is health-related search. Specifically, many consumers begin their navigation by first conducting a search using keywords or phrases for specific conditions or ailments. In Q1, the top health-related search keyword/phrase, “pregnancy,” was entered more than 17 million times, followed by “cancer,” “flu,” and “fitness,” each of which generated at least 15 million searches.

Searches Conducted Using Major U.S. Search Engines
Number of Searches Q1 2007
Total U.S. – Home/Work/University Locations
Source: comScore
Keyword or Phrase Searches (MM)
Pregnancy 17.5
Cancer 15.3
Flu 15.3
Fitness 15.0
Cold 13.8
Rash 12.6
Nutrition 7.4
Weight Loss 7.2
Diabetes 4.9
Depression 4.9

About comScore

comScore, Inc. is a global leader in measuring the digital world. This capability is based on a massive, global cross-section of more than 2 million consumers who have given comScore permission to confidentially capture their browsing and transaction behavior, including online and offline purchasing. comScore panelists also participate in survey research that captures and integrates their attitudes and intentions. Through its proprietary technology, comScore measures what matters across a broad spectrum of behavior and attitudes. comScore consultants apply this deep knowledge of customers and competitors to help clients design powerful marketing strategies and tactics that deliver superior ROI. comScore services are used by more than 700 clients, including global leaders such as AOL, Microsoft, Yahoo!, Verizon, Best Buy, The Newspaper Association of America, Tribune Interactive, ESPN, Fox Sports, Nestlé, MBNA, Starcom USA, Universal McCann, the United States Postal Service, Merck and Expedia. For more information, please visit

Andrew Lipsman
comScore, Inc.
+1 312 775 6510


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