1. tube feeding or parenteral nutrition. 2. patients who are symptomatic and require oxygen (ordinal scale for clinical improvement score \>3) at the time of screening. 3. respiratory decompensation requiring mechanical ventilation. 4. uncontrolled diabetes type 2. 5. autoimmune disease. 6. pregnant or lactating women. 7. any condition which, in the opinion of the principal investigator, would prevent full participation in this trial or would interfere with the evaluation of the trial endpoints.

1. tube feeding or parenteral nutrition. 2. patients who are symptomatic and require oxygen (ordinal scale for clinical improvement score \>3) at the time of screening. 3. respiratory decompensation requiring mechanical ventilation. 4. uncontrolled diabetes type 2. 5. autoimmune disease. 6. pregnant or lactating women. 7. any condition which, in the opinion of the principal investigator, would prevent full participation in this trial or would interfere with the evaluation of the trial endpoints.

tube feeding or parenteral nutrition. patients who are symptomatic and require oxygen (ordinal scale for clinical improvement score >3) at the time of screening. respiratory decompensation requiring mechanical ventilation. uncontrolled diabetes type 2. autoimmune disease. pregnant or lactating women. any condition which, in the opinion of the principal investigator, would prevent full participation in this trial or would interfere with the evaluation of the trial endpoints.

tube feeding or parenteral nutrition. patients who are symptomatic and require oxygen (ordinal scale for clinical improvement score >3) at the time of screening. respiratory decompensation requiring mechanical ventilation. uncontrolled diabetes type 2. autoimmune disease. pregnant or lactating women. any condition which, in the opinion of the principal investigator, would prevent full participation in this trial or would interfere with the evaluation of the trial endpoints.

1. tube feeding or parenteral nutrition. 2. patients who are symptomatic and require oxygen (ordinal scale for clinical improvement score >3) at the time of screening. 3. respiratory decompensation requiring mechanical ventilation. 4. uncontrolled diabetes type 2. 5. autoimmune disease. 6. pregnant or lactating women. 7. any condition which, in the opinion of the principal investigator, would prevent full participation in this trial or would interfere with the evaluation of the trial endpoints.

1. tube feeding or parenteral nutrition. 2. patients who are symptomatic and require oxygen (ordinal scale for clinical improvement score >3) at the time of screening. 3. respiratory decompensation requiring mechanical ventilation. 4. uncontrolled diabetes type 2. 5. autoimmune disease. 6. pregnant or lactating women. 7. any condition which, in the opinion of the principal investigator, would prevent full participation in this trial or would interfere with the evaluation of the trial endpoints.