Krasner's Microbial Challenge: A Public Health Perspective is a unique resource unlike any other introductory microbiology textbook. Combining strong scientific grounding with a conversational writing style, it covers the subject through a public health lens and uses current events students encounter in the media, such as disease outbreaks, to engage and educate. The essentials to a foundational understanding of microbiology are fully covered, including bacteria, viruses and prions, microbial genetics, the human microbiome, and immunity combined with a focus on epidemiology and current challenges faced in public health. Now in a modernized fourth edition and featuring the voice of new lead author, Dr. Shors' research and extensive virology knowledge complements the late Dr. Krasner's student-friendly approach crafted from 50 years of teaching microbiology. The ideal introductory text for nursing programs, non-majors microbiology, allied health, and public health programs, Krasner's Microbial Challenge: A Public Health Perspective, Fourth Edition is user-friendly, dynamic, and humorous. Its conversational style is certain to engage students and enhance their understanding of the ongoing interactions between microbes and their human hosts.