By Linda Loyd, The Philadelphia Inquirer Knight Ridder/Tribune Business News
Sep. 18--Scientists at Merck & Co. Inc., in the Philadelphia suburbs, and Aventis Pasteur, in Swiftwater, Pa., said yesterday that they had begun an early trial to test a combination of their two experimental AIDS vaccines in healthy people.
The study on 250 noninfected adults at 17 U.S. locations -- the closest is in Allentown -- will seek to determine whether an experimental AIDS vaccine made by Aventis Pasteur, when given as a booster to Merck's experimental AIDS vaccine, i