The most concise, comprehensive, and up-to-date medical microbiology & immunology review! Gives students the high-yield information they need to prepare for the USMLE Step 1 and course exams. Completely updated throughout, the new edition covers developments in HIV, hepatitis, smallpox, SARS, and more. Features case discussions, USMLE-style questions, and a USMLE-style practice exam.