Salmon-Challis National Forest, Idaho. It is the second largest National Forest in the continental United States. In 1876, the US Congress created an office to evaluate the conditions of forests in the US. In 1891, President Theodore Roosevelt assigned the control of the newly named, national forests to the US Forest Service.
Cold sores are caused by certain strains of the herpes simplex virus (HSV). HSV-1 usually causes cold sores.
Cold sores are caused by herpes simplex virus. There are two types, called type 1 and type 2. Either type can be caught on any part of the body: lips and genitals are the most common places. This page is about facial sores â which can also be called fever blisters, facial herpes or herpes labialis.