Section Headings and Selected Papers: Secondary Immunodeficiency and its Therapy. Introduction and overview on AIDS, J L Fahey & B Hofmann. Immunopharmacology of Neuroendocrine Interaction. Overview on neuroimmodulation and a possible role for serotonergic system, K Masek. Immunoregulatory Molecules, Receptors and their Immunopharmacological Implications. Cell-cell contact and cytokinine-controlled B lymphocyte responses and their potential influences in hematopoiesis, A Rolink et al. Recent Advances in Vaccine Development. Modulation of the immunogenic characters of protective epitopes in synthetic vaccines, F Audibert et al. Immunopharmacology of Model Cytokinine, IL-6 (BSF2/IFNB2). Interleukin 6 and its receptor: pathological role in autoimmunity and lymphoid malignancy, T Hirano et al. Transmembrane Signalling and Chemical Mediators. The role of kinase activation and gene expression in the action of interleukin 2, W L Farrar et al. Workshop Sessions. Author Index. Subject Index.