A 50-year-old woman was hospitalized on the 5th day of illness with complaints of severe headache, body temperature 39°C, insomnia. Objectively established: condition heavy, slightly agitated, facial skin hyperemic, sclera injected. Positive Govorov-Godelier symptom. On the trunk and extremities abundant roseola-petechial rash; tachycardia, AT - 140/70 mm Hg. Art. For emergency chemoprophylaxis at the site of this infection appoint: