Ruby Serrati, a nineteen year old university student majoring in political science, has no remarkable past medical history. Her only medications are an oral contraceptive pill, and she has only seen her family physician recently for a pap smear, and counseling regarding stress associated with her parents' divorce last year. She was out on a date two nights ago, and had sexual intercourse with her partner. Yesterday she felt relatively unwell, with some chills, and loss of appetite