a. Adult individuals, age >18 and <65 years <br/ >b. COVID-19 infection documented by a positive RT-PCR test <br/ >c. Hospitalised patients with severe COVID-19 infection, characterized by <br/ >fever (at the time of screening or when admitted) and requiring supplemental oxygen through non- re-breath mask between 10L-15L/ min. <br/ >d. Clinical/radiological evidence of interstitial pneumonia requiring admission (optional) <br/ >e. Informed verbal consent under urgent conditions, documented in the electronically <br/ >

a. Adult individuals, age >18 and <65 years <br/ >b. COVID-19 infection documented by a positive RT-PCR test <br/ >c. Hospitalised patients with severe COVID-19 infection, characterized by <br/ >fever (at the time of screening or when admitted) and requiring supplemental oxygen through non- re-breath mask between 10L-15L/ min. <br/ >d. Clinical/radiological evidence of interstitial pneumonia requiring admission (optional) <br/ >e. Informed verbal consent under urgent conditions, documented in the electronically <br/ >

a. Adult individuals, age >18 and <65 years <br/ >b. COVID-19 infection documented by a positive RT-PCR test <br/ >c. Hospitalised patients with severe COVID-19 infection, characterized by <br/ >fever (at the time of screening or when admitted) and requiring supplemental oxygen through non- re-breath mask between 10L-15L/ min. <br/ >d. Clinical/radiological evidence of interstitial pneumonia requiring admission (optional) <br/ >e. Informed verbal consent under urgent conditions, documented in the electronically <br/ >

a. Adult individuals, age >18 and <65 years <br/ >b. COVID-19 infection documented by a positive RT-PCR test <br/ >c. Hospitalised patients with severe COVID-19 infection, characterized by <br/ >fever (at the time of screening or when admitted) and requiring supplemental oxygen through non- re-breath mask between 10L-15L/ min. <br/ >d. Clinical/radiological evidence of interstitial pneumonia requiring admission (optional) <br/ >e. Informed verbal consent under urgent conditions, documented in the electronically <br/ >