Mary Ruebush, PhD, is one of the nation’s most experienced instructors in Microbiology and Immunology for USMLE Step 1 review.

She is the author of Becker’s Step 1 USMLE lecture notes in Immunology and Microbiology, and from 2000 to 2012 was the author of the Kaplan Step 1 Review Notes. Dr. Ruebush received her PhD from the University of Georgia and has taught Infectious Disease, Immunology and Pathology at Bowman-Gray Medical School, the Uniformed Services University of the Health Sciences and Montana State University, where she received Outstanding Teacher of the Year.