1. without dyspnea and with no evidence of pneumonia, ARDS, organ failure or requiring admission to ICU.
2. All patients ≥55 years age or ≥1 risk factor for disease complications (prior pulmonary, kidney or cardiovascular disease, diabetes mellitus, hypertension, bone merrow suppression, solid organ transplant, HIV with CD4\<250, heavy smoker, BMI \>30). All participants will sign a written informed consent.
You may not be if
1. Patients unable to perform spirometry
2. contraindications for spirometry (hemoptysis, active tuberculosis, syncope associated with forced exhalation or increased risk for spirometry)
