Time relapsed from hospitalization (1st day) until hospital discharge in patients receiving NLC-V treatment.;Time to clinical improvement, defined as a national Early Warning Score 2 (NEWS2) of </= 2 maintained for 24 hours, in the treatment group (NLC-V) compared to the control group.

Time relapsed from hospitalization (1st day) until hospital discharge in patients receiving NLC-V treatment.;Time to clinical improvement, defined as a national Early Warning Score 2 (NEWS2) of </= 2 maintained for 24 hours, in the treatment group (NLC-V) compared to the control group.