Front matter -- Acknowledgments -- Contents -- Summary -- Challenges for the Development of New Antimicrobials- Rethinking the Approaches: Report of a Workshop -- Promising Approaches to the Development of Immunomodulation for the Treatment of Infectious Diseases: Report of a Workshop -- Appendix A Statement of Task -- Appendix B New Classes of Antimicrobials Committee Biographical Sketches -- Appendix C New Classes of Antimicrobials Workshop -- Appendix D Immunomodulation Committee Biographical Sketches -- Appendix E Immunomodulation Workshop.