A 22 year old medical student comes to your office complaining of sore throat, runny nose, cough, and fever for two days. Her back muscles also ache and she was unable to sleep soundly last night. She has been rotating through the pediatric department in the hospital. Her symptoms started "all of a sudden". Physical exam reveals no palpable nodes in the neck.

Labs: Helical, enveloped, ssRNA virus grown in cell culture from throat washings or identified by fluorescent-antibody staining. Rise in antibody titer of greater than 4-fold in paired serum samples taken early in the illness and 10 days later.