1. Tube feeding or parenteral nutrition. <br/ >2. Oxygen requirements beyond use of nozzles or simple mask as per score 4 <br/ >3. Respiratory decompensation requiring mechanical ventilation. <br/ >4. Uncontrolled diabetes type 2. <br/ >5. Autoimmune disease. <br/ >6. Pregnant or lactating women. <br/ >7. Need for admission to ICU in the course of the present hospitalization at any time prior to completion of the recruitment to the study. <br/ >8. 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. <br/ >2. Oxygen requirements beyond use of nozzles or simple mask as per score 4 <br/ >3. Respiratory decompensation requiring mechanical ventilation. <br/ >4. Uncontrolled diabetes type 2. <br/ >5. Autoimmune disease. <br/ >6. Pregnant or lactating women. <br/ >7. Need for admission to ICU in the course of the present hospitalization at any time prior to completion of the recruitment to the study. <br/ >8. 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.

N/A

N/A

1. Tube feeding or parenteral nutrition. <br/ >2. Oxygen requirements beyond use of nozzles or simple mask as per score 4 <br/ >3. Respiratory decompensation requiring mechanical ventilation. <br/ >4. Uncontrolled diabetes type 2. <br/ >5. Autoimmune disease. <br/ >6. Pregnant or lactating women. <br/ >7. Need for admission to ICU in the course of the present hospitalization at any time prior to completion of the recruitment to the study. <br/ >8. 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. <br/ >2. Oxygen requirements beyond use of nozzles or simple mask as per score 4 <br/ >3. Respiratory decompensation requiring mechanical ventilation. <br/ >4. Uncontrolled diabetes type 2. <br/ >5. Autoimmune disease. <br/ >6. Pregnant or lactating women. <br/ >7. Need for admission to ICU in the course of the present hospitalization at any time prior to completion of the recruitment to the study. <br/ >8. 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.