During the last decade or so vaccine development has been facilitated by rapid advances in molecular and cell biology. These have laid the foundations of a new generation of vaccines exemplified by subunit vaccines produced through gene cloning and by synthetic peptides mimicking small regions of proteins on the outer coat of viruses. Such peptide~ are capable of eliciting virus-neutralizing antibodies. Unfortunately, subunit and peptide vaccines are only weakly or non immunogenic in the absence of immunological adjuvants that are known to augment specific cell-mediated immune responses to the antigens and to promote the formation of protective antibodies. This book contains the proceedings of the 4th NATO Advanced Studies Institute (ASI) "Vaccines: New Generation Immunological Adjuvants" held at Cape Sounion Beach, Greece, during 24 June -5 . July 1994 and deals in depth with both theoretical and practical aspects of vaccinology. These include the role of antigen presenting cells in the induction of immune responses. immunopotentiation by a variety of new generation immunological adjuvants and vaccine carriers. and recent advances and perspectives in experimental vaccines as well as vaccinatioll with nucleic acids. We express our appreciation to Dr. K. Dalsgaard and Dr. J. L. Virelizier for their cooperatioll in planning the ASI and to Mrs. Concha Pening for her excellent production of the manuscripts. The ASI was held under the sponsorship of NATO Scientific Affairs Division and generously co-sponsored by SmithKline Beecham Pharmaceuticals (Philadelphia).

Zusammenfassung
Proceedings of a NATO ASI held in Cape Sounion, Greece, June 24-July 5, 1994.

Inhalt
Adjuvants for new and improved vaccines.- Liposome mediated immunopotentiation and immunomodulation.- Quil A, anti-carbohydrate antibody specificity and biological function.- Vaccine adjuvants based on gamma inulin.- Interleukin-2 as a co-adjuvant for liposomal tetanus toxoid.- Design of vaccines for the induction of antibody responses in Th-cell deficient individuals.- Strategies for the stimulation of Th cell subsets.- Feline immunodeficiency virus as a vaccine model.- Rational design of vaccine molecules to prevent pertussis.- Multicomponent viral vaccines and their use as immunogen delivery systems.- Vaccines against HPV of the uterine cervix: Problems in clinical applicability.- Local chemotherapy of lymph node metastases: Optimization of targeting accuracy.- Synthetic peptide vaccines: Success at last.- Peptide vaccines: New approaches to immunopotentiation.- Genetic restriction of responses to peptide antigens.- DNA-based immunization: Prospects for a hepatitis B vaccine.- Characterization of immune responses elicited by an experimental facilitated-DNA vaccine for human immunodeficiency virus type-1 (HIV-1).- Recombinant self-replicating RNA vaccines.