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.
Learn what causes cold sores. Cold sores are caused by the herpes simplex virus (HSV), a common worldwide virus that is contagious. There are two types of HSV. HSV-1 causes cold sores or fever blisters around the mouth and HSV-2 usually causes genital herpes (although HSV-1 can also cause genital herpes). HSV-1 is spread through skin to skin contact like kissing or through sharing utensils or glasses.