A viral infectious disease that results_in infection, has_material_basis_in Colorado tick fever virus, which is transmitted_by rocky mountain wood tick, Dermacentor andersoni. The infection has_symptom fever for 2-3 days, followed by an afebrile period of similar duration and then another 2-3 days of fever, has_symptom headache, has_symptom myalgia, and has_symptom fatigue.