Acknowledgements are due to the following experts for their comments and advice on the draft of “Good manufacturing practices for biological products”: Professor I. Addae-Mensah, Chemistry Department, University of Ghana, Accra, Ghana; Professor H. Blume, German Pharmacists’ Central Laboratory, Eschborn, Germany; Dr A. Fenyves, Paul Ehrlich Institute, Langen, Germany; Dr C. Guthrie, General Manager, Blood Products Division, CSL Ltd., Parkville, Australia; Dr U. Ihrig, German Pharmacists’ Central Laboratory, Eschborn, Germany; Mr K. Kawamura, Takeda Chemical Industries Ltd., Nihonbashi, Chuo-ku, Tokyo, Japan; Mr L G. Kinnander, Chief Pharmaceutical Inspector, Medical Products Agency. Uppsala, Sweden; Mrs S. F. Langlois, Director, Regulatory Affairs, Connaught Laboratories Ltd., A Pasteur Mérieux Company, Willowdale, Ontario, Canada; Mr P. Lemoine, Institute of Hygiene and Epidemiology, Brussels, Belgium; Mr J. Lyng, State Serum Institute, Copenhagen, Denmark; Professor N.V Medunitsin, Director, Tarasevich State Institute for the Standardization and Control of Medical Biological Preparations, Moscow, USSR; Dr R. Netter, Paris, France: Professor A. A. Olaniyi, Pharmaceutical & Chemistry Department, Faculty of Pharmacy, University of Ibadan, Ibadan, Nigeria.