Herpes simplex: the primary infection.

A primary infection with herpes simplex virus (HSV) occurs at some time in the life of almost every member of the population, especially among those living in crowded, unsanitary conditions. In many cases the lesions are subclinical, and in most cases they are self-limited even when clinical. In a few patients, such as the newborn infant, the patient with concomitant eczema, or the patient with reduced immunity, the primary infection may become severe, generalized, and life-threatening. Type 1 HSV has a predilection for a number of sites, including the oral cavity, the eye, and the skin; and type 2 HSV has a predilection for the genital area and for the newborn.