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.
Outbreaks of cold sores are triggered by such factors as emotional stress, fever, illness, fatigue, immune deficiency syndrome, common cold, infection, injury to the mouth, exposure to sunlight, hormonal changes such as menstruation or pregnancy, wind burn, skin trauma, excessive heat, and food allergies.