NAARDEN, The Netherlands, 1st May 2007 - BAC BV, the Bio Affinity Company, announced today that it has entered into an agreement with sanofi pasteur, the vaccines business of the sanofi-aventis Group. BAC’s CaptureSelect customised affinity ligands have been selected by sanofi pasteur as they potentially offer high stability and specificity for process-scale purification of some of its vaccine products. Sanofi pasteur is one of the world’s largest companies dedicated to developing human vaccines.