His complete address is: Dr Farrokh Modabber Manager, Steering Committee on Vaccines for Leishmaniasis UNDP/World Bank/WHO Special Programme for Research and Training in Tropical Diseases (TDR) World Health Organization 1211 Geneva 27, Switzerland Telephone 41 22 791-3879 Fax 41 22 791 4854 e-mail: <modabberf at who.ch>