inclusion criteria: - in a medical area ward dedicated to covid-19 patients - positivity by rt_pcr of the search for genetic material of sars-cov2 - covid-19 pneumonia with moderate clinical picture based on clinical parameters - o2 saturation> 94% with maximum fio2 32% - respiratory acts <30 / minute - age >18 years - consent to participate in the study

inclusion criteria: - in a medical area ward dedicated to covid-19 patients - positivity by rt_pcr of the search for genetic material of sars-cov2 - covid-19 pneumonia with moderate clinical picture based on clinical parameters - o2 saturation> 94% with maximum fio2 32% - respiratory acts <30 / minute - age >18 years - consent to participate in the study