* existing decompensated conditions such as diabetes mellitus, hypertension, coronary insufficiency, coronary artery disease, chronic obstructive pulmonary disease (or any chronic or severe lung disease), chronic kidney disease, cancer, immunosuppression, mood change * respiratory frequency \> 20 / min, pulse \> 120 bpm, systolic \< 90 mmhg, diastolic \< 60 mmhg * the patient seems toxic and distressed, or, o2 at rest \<93% in ambient air, or desaturation when ambulating * being diagnosed with severe sars-cov-2 disease (covid19) * patients with low oxygen saturation levels, need for icu entry, need or likelihood of invasive mechanical ventilation * patients requiring bronchodilator treatment * patients with a known history of asthma and/or lung disease * patients with severe decompensated chronic obstructive pulmonary disease * patients who are unable to give consent or who are unable to follow up on the test group will be excluded

* existing decompensated conditions such as diabetes mellitus, hypertension, coronary insufficiency, coronary artery disease, chronic obstructive pulmonary disease (or any chronic or severe lung disease), chronic kidney disease, cancer, immunosuppression, mood change * respiratory frequency \> 20 / min, pulse \> 120 bpm, systolic \< 90 mmhg, diastolic \< 60 mmhg * the patient seems toxic and distressed, or, o2 at rest \<93% in ambient air, or desaturation when ambulating * being diagnosed with severe sars-cov-2 disease (covid19) * patients with low oxygen saturation levels, need for icu entry, need or likelihood of invasive mechanical ventilation * patients requiring bronchodilator treatment * patients with a known history of asthma and/or lung disease * patients with severe decompensated chronic obstructive pulmonary disease * patients who are unable to give consent or who are unable to follow up on the test group will be excluded

- existing decompensated conditions such as diabetes mellitus, hypertension, coronary insufficiency, coronary artery disease, chronic obstructive pulmonary disease (or any chronic or severe lung disease), chronic kidney disease, cancer, immunosuppression, mood change - respiratory frequency > 20 / min, pulse > 120 bpm, systolic < 90 mmhg, diastolic < 60 mmhg - the patient seems toxic and distressed, or, o2 at rest <93% in ambient air, or desaturation when ambulating - being diagnosed with severe sars-cov-2 disease (covid19) - patients with low oxygen saturation levels, need for icu entry, need or likelihood of invasive mechanical ventilation - patients requiring bronchodilator treatment - patients with a known history of asthma and/or lung disease - patients with severe decompensated chronic obstructive pulmonary disease - patients who are unable to give consent or who are unable to follow up on the test group will be excluded

- existing decompensated conditions such as diabetes mellitus, hypertension, coronary insufficiency, coronary artery disease, chronic obstructive pulmonary disease (or any chronic or severe lung disease), chronic kidney disease, cancer, immunosuppression, mood change - respiratory frequency > 20 / min, pulse > 120 bpm, systolic < 90 mmhg, diastolic < 60 mmhg - the patient seems toxic and distressed, or, o2 at rest <93% in ambient air, or desaturation when ambulating - being diagnosed with severe sars-cov-2 disease (covid19) - patients with low oxygen saturation levels, need for icu entry, need or likelihood of invasive mechanical ventilation - patients requiring bronchodilator treatment - patients with a known history of asthma and/or lung disease - patients with severe decompensated chronic obstructive pulmonary disease - patients who are unable to give consent or who are unable to follow up on the test group will be excluded