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 the HSV1 virus (pictured), which almost everyone carries. But most of the time our bodies can fight the illness off. Researcher Professor Juergen Haas said the finding shows the importance of studying the person that is infected, as well as the infection itself.