inclusion criteria: age 18-85 years. admitted to the hospital (med-surg or critical care) with dyspnea diagnosis of covid-19 based on either positive nasal or oral pharyngeal swab by pcr, or highly probable clinical picture based on clinical and cxr/ct scan requiring oxygen supplementation or o2 saturation on room air of ≤ 94% at least 2 of the following 4 risk factors for clinical worsening: age >= 60 years t2dm or pre-diabetes as evidenced by either treatment with a hypoglycemic agent or any documented hga1c >= 5.6 obesity, based on bmi >= 30 kg/m2 hypertension, based on treatment with an antihypertensive medication or systolic or diastolic blood pressure measurement >= 140 or >= 90 mmhg, documented at enrollment or at any time within the prior 6 months.

inclusion criteria: age 18-85 years. admitted to the hospital (med-surg or critical care) with dyspnea diagnosis of covid-19 based on either positive nasal or oral pharyngeal swab by pcr, or highly probable clinical picture based on clinical and cxr/ct scan requiring oxygen supplementation or o2 saturation on room air of ≤ 94% at least 2 of the following 4 risk factors for clinical worsening: age >= 60 years t2dm or pre-diabetes as evidenced by either treatment with a hypoglycemic agent or any documented hga1c >= 5.6 obesity, based on bmi >= 30 kg/m2 hypertension, based on treatment with an antihypertensive medication or systolic or diastolic blood pressure measurement >= 140 or >= 90 mmhg, documented at enrollment or at any time within the prior 6 months.

inclusion criteria: 1. age 18-85 years. 2. admitted to the hospital (med-surg or critical care) with dyspnea 3. diagnosis of covid-19 based on either 1. positive nasal or oral pharyngeal swab by pcr, or 2. highly probable clinical picture based on clinical and cxr/ct scan 4. requiring oxygen supplementation or o2 saturation on room air of ≤ 94% 5. at least 2 of the following 4 risk factors for clinical worsening: 1. age >= 60 years 2. t2dm or pre-diabetes as evidenced by either treatment with a hypoglycemic agent or any documented hga1c >= 5.6 3. obesity, based on bmi >= 30 kg/m2 4. hypertension, based on treatment with an antihypertensive medication or systolic or diastolic blood pressure measurement >= 140 or >= 90 mmhg, documented at enrollment or at any time within the prior 6 months.

inclusion criteria: 1. age 18-85 years. 2. admitted to the hospital (med-surg or critical care) with dyspnea 3. diagnosis of covid-19 based on either 1. positive nasal or oral pharyngeal swab by pcr, or 2. highly probable clinical picture based on clinical and cxr/ct scan 4. requiring oxygen supplementation or o2 saturation on room air of ≤ 94% 5. at least 2 of the following 4 risk factors for clinical worsening: 1. age >= 60 years 2. t2dm or pre-diabetes as evidenced by either treatment with a hypoglycemic agent or any documented hga1c >= 5.6 3. obesity, based on bmi >= 30 kg/m2 4. hypertension, based on treatment with an antihypertensive medication or systolic or diastolic blood pressure measurement >= 140 or >= 90 mmhg, documented at enrollment or at any time within the prior 6 months.