1994 - Aventis Pasteur MSD formed from a European alliance between Aventis Pasteur SA Lyon, France (formerly Pasteur Mérieux Connaught) and Merck & Co., Inc. of Whitehouse Station, New Jersey, USA; 2004 - sanofi pasteur MSD after Sanofi-aventis announced the official change in the legal denomination of the Aventis Pasteur company, which will henceforth be named sanofi pasteur. 2004, voted the change in name from Aventis Pasteur to sanofi pasteur. The Aventis Pasteur MSD joint venture, equally owned by Aventis Pasteur and Merck & Co. Inc., which markets vaccines in Europe, also changes its denomination to sanofi pasteur MSD.