Chаrles, а 49-yeаr-оld male, cоmes tо the clinic feeling ill with flu-like symptoms. He also reports a burning/tingling rash on his upper back, and a headache. Temperature is 99.9. Upon examination, the FNP notes a unilateral rash over the left side of the upper back that does not cross the midline (see photo). The FNP does not notice a rash anywhere else on the body. What is the most appropriate medical intervention at this time?