National Institute of Allergy and Infectious Diseases, NIH: Volume 2: Impact on Global Health covers the scientific aspects of the entire portfolio of NIAID, including microbiology and infectious disease, HIV/AIDS, and immunology and vaccines. All major diseases and the relevant immunology and vaccine development are described in detail. In addition, all major NIAID programs, initiatives, and clinical trials are discussed and illustrate the global involvement of NIAID in biomedical research and its impact on public health worldwide. By providing this information, the global scientific community will be able to access and benefit from these programs and initiatives.