Merck to Hold Second-Quarter 2007 Sales and Earnings Conference Call and Web Cast on July 23

WHITEHOUSE STATION, N.J., June 20, 2007 - Merck & Co., Inc. will hold a second-quarter 2007 sales and earnings conference call with institutional investors and analysts beginning at 9 a.m. ET on Monday, July 23.  During this call, Graeme Bell, executive director, Investor Relations, joined by Richard T. Clark, chairman, president and chief executive officer, and Judy C. Lewent, executive vice president and chief financial officer, will provide an overview of Merck's financial performance for the quarter.

Journalists are invited to listen only by calling (706) 758-9928 or (800) 399-7917.  A replay of the call will be available starting at 11 a.m. ET on July 23 through 5 p.m. ET on July 30.  To listen to the replay, dial (706) 645-9291 or (800) 642-1687 and enter ID # 9413650.

Investors, journalists and the general public may access a live audio Web cast of the call on Merck's Web site at http://www.merck.com/newsroom/webcast.  Software needed to listen to the Web cast is available on the corporate Web site and should be downloaded prior to the beginning of the Web cast.  A replay of the Web cast will be available from 11 a.m. ET on July 23 through 5 p.m. ET on July 30.  The second-quarter sales and earnings press release and supplemental financial disclosures will also be available in the Newsroom.

About Merck
Merck & Co., Inc. is a global research-driven pharmaceutical company dedicated to putting patients first.  Established in 1891, Merck discovers, develops, manufactures and markets vaccines and medicines to address unmet medical needs.  The company devotes extensive efforts to increase access to medicines through far-reaching programs that not only donate Merck medicines but help deliver them to the people who need them.  Merck also publishes unbiased health information as a not-for-profit service.  For more information, visit www.merck.com.

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