JOHN B. ROBBINS is Chief of the Laboratory of Developmental and Molecular Immunity at the National Institute of Child Health and Human Development of the National Institute of Health.

• Session I Development of Pneumococcal Vaccine by R. Austrian Efficacy of the 14-Valent Pneumococcal Vaccine in Selected Populations in the U.S. by G. Bolan et al. Antibody Responses of Elderly Persons Immunized with Pneumococcal Polysaccharide Vaccine by M. Mufson and G. Schiffman Immunization of Adults and Geriatric Patients by G. Stollerman Ontogeny of Human Antibody Responses to Bacterial Capsular Polysaccharides by R. Insel Compensation for Vaccine-Related Injuries by R. Kingham Potential Use of Antiidiotype Antibodies as Vaccines by M. Gurish and A. Nisonoff Session II Oral Shigella Vaccines by E. Tramont and S. Formal Field Trials of Efficacy of Attenuated Salmonella Typhi Oral Vaccine Strain TY21A by M. Levine et al. Development of a Recombinant Live Oral Cholera Vaccine by J. Kaper et al. Genetic Analysis of a Bordetella Pertussis and Its Implications for Designing a New Pertussis Vaccine by S. Stibitz et al. Protective Epitopes of Streptococcal M. Proteins by J. Seyer et al. An Escherichia Coli Pilus Peptide Vaccine Prevents Renal Colonization and Infection in Balb/C Mice by N. Schmidt, P. O'Hanley and G. Schoolnik Antibodies to Peptides Corresponding to a Conserved Sequence Among Gonococcal Pili Block Bacterial Adhesion by J. Rothbard and G. Schoolnik Synthetic Peptide Conjugates as Probes for Anti-Cholera/Coli Heat Labile Toxin Vaccine by C. Jacob Session III Some Escherichia Coli Adhesion by I. Orskov and F. Orskov Adhesions of Bordetella Pertussis as Vaccine Components by A. Robinson, L. Ashworth and L. Irons Bacterial Adhesins of Ciliated and Alveolar Respiratory Epithelial Cells by E. Tuomanen Gonococcal Pilus Vaccine by E. Tramont et al. Pseudomas Polar Pili: Antigenic Determants by W. Paranchych et al. Adhesive Properties and O,K,H, and F. Antigens of E. Coli Associated with Recurrent Pyelonephritis by C. Eden et al. Passive Lacteal Immunity to Pili of Enterotoxigenic Escherichia Coli in Swine: Antibody in Milk During the First Two Lactations After Live Oral Vaccine by H. Moon, D. Rogers, and R. Rose On the Trail of Adherence Mechanisms in Vibrio Cholerae: Many Scents But Not Much Sense by B. Booth et al. Session IV Bacterial Antibody to a Polyvalent Meningococcal Protein-Polysaccharide Vaccine by W. Zollinger et al. Immune Responses of Adults and Children to Group B Neisseria Meningitidis Outer Membrane Protein Vaccines by C. Frasch et al. Immune Responses of Adults and Children to Group B Neisseria Meningitidis Outer Membrane Protein Vaccines by C. Frasch et al. High-Molecular-Weight Proteins on the Surface of Haemophilus Influenzae Type b by E. Hansen Outer Membrane Protein a of Haemophilus Influenzae: Occurrence and Antigenicity by Van Alphen an