Built upon the foundation of Professor Alcamo's work, AIDS: The Biological Basis, Fourth Edition, continues to educate professors and students alike about the biology of HIV and AIDS. With completely updated content and extended commentary and discussion topics, this text continues to evolve to keep abreast of epidemiological patterns and research developments and sets the mark for compiling an extensive breadth of information with sufficient detail that permits the reader to learn the basics of AIDS immunopathology and epidemiology and how AIDS drugs and vaccines may and can work.