Performance of New Diagnostic Methods in Older Adults With Pneumonia

Inclusion Criteria: \- Adults aged 65 and older presenting to the ED with suspected pneumonia defined as (1) either a physician order for CXR OR CT OR a chief complaint consistent with dyspnea; AND (2) physician suspicion of pneumonia prior to ED testing (score of 2-5 on Likert scale) Exclusion Criteria: * inability to obtain consent from the patient or an LAR * active cancer * organ transplant * immunosuppression * trauma activation * suicidal ideation * incarceration * antibiotics in the last 14 days * a separate episode of lower respiratory illness in the last 30 days