1. Patient may be diagnosed with COVID-19 pneumonia based on clinical history consistent with COVID 19 without PCR proof <br/ >2.Acute lung injury as evidenced by P/F ratio <300 <br/ >3. Clinician deems failure of therapy with conventional low flow oxygen

1. Patient may be diagnosed with COVID-19 pneumonia based on clinical history consistent with COVID 19 without PCR proof <br/ >2.Acute lung injury as evidenced by P/F ratio <300 <br/ >3. Clinician deems failure of therapy with conventional low flow oxygen

1. Patient may be diagnosed with COVID-19 pneumonia based on clinical history consistent with COVID 19 without PCR proof <br/ >2.Acute lung injury as evidenced by P/F ratio <300 <br/ >3. Clinician deems failure of therapy with conventional low flow oxygen

1. Patient may be diagnosed with COVID-19 pneumonia based on clinical history consistent with COVID 19 without PCR proof <br/ >2.Acute lung injury as evidenced by P/F ratio <300 <br/ >3. Clinician deems failure of therapy with conventional low flow oxygen