Problem:
A 13-year-old boy presents with a 3-day history of paroxysmal thoracic pain aggravated by deep breathing, coughing, or movement. He also complains of "achy joints." He has always been an active child, and the last time he was seen was for his 8th grade basketball physical, at which time he was doing well with no complaints. He relates that a 16-year-old brother of his recently had the same experience, and he looks scared. Which of the following viruses could cause this condition? A. Adenovirus B. Coxsackie B C. Parainfluenza virus D. Parvovirus