A 20-year-old patient complains of a rash in the area of his hands, trunk, buttocks, and penis. The rash is accompanied by intense itching, especially in the evening and at night. According to the patient's medical history, he fell ill one week ago and he lives in a dormitory. Objectively, paired papules and vesicles are localized on the skin of the patient's hands, trunk, buttocks, and penis. What is the most likely diagnosis in this case?