RecruitingDiagnostic testAn Adjunct Test Distinguishing Bacterial From Viral Etiology Improves Resource Utilization and Efficiency in the ED.The purpose of this study is to evaluate overall changes in patient management and longer-term resource utilization between control and test arms, including (but not limited to) additional work-up (including other diagnostic tests and consults), antimicrobial treatments, disposition decisions and hospital length of stay (LOS)