2. Herpes simplex  (Trust Mark: Doctor-Reviewed)
Herpes simplex is a viral infection that mainly affects the mouth or genital area.is usually associated with infections of the lips, mouth, and face. It is the most common herpes simplex virus and many people develop it in childhood. • Reviewer: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; Jatin M. Vyas, MD, PhD, Assistant Professor in Medicine, Harvard Medical School, Assistant in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

3. Keratitis : Herpes simplex keratitis  (Trust Mark: Doctor-Reviewed)
A major cause of adult eye disease, herpes simplex keratitis may lead to:.• Author: Maureen Haggerty