Frequencies of individual COVID-19 symptoms at week 0; week 2 (primary time of analysis); week 4 and week 6 as well as after 6 months.

Frequencies of individual COVID-19 symptoms at week 0; week 2 (primary time of analysis); week 4 and week 6 as well as after 6 months.

Frequency of complete symptom resolution after 2 weeks of dietary supplementation.

Frequency of complete symptom resolution after 2 weeks of dietary supplementation.

Frequency of hospitalization with a continuous oxygen requirement of at least 24 hours.Control calls are scheduled for week 0; week 2; week 4 and week 6. In UKSH patients; as part of the Global Consent residual materials serum and stool are preserved for exploratory analyzes of the serum levels of tryptophan; tryptophan metabolites and neopterin and the composition of the stool microbiome.

Frequency of hospitalization with a continuous oxygen requirement of at least 24 hours.Control calls are scheduled for week 0; week 2; week 4 and week 6. In UKSH patients; as part of the Global Consent residual materials serum and stool are preserved for exploratory analyzes of the serum levels of tryptophan; tryptophan metabolites and neopterin and the composition of the stool microbiome.