inclusion criteria: men or non-pregnant female aged 18 to 65 years hospitalized with moderate covid-19 infection: body temperature > 37.5 °c; respiratory rate > 22/min; shortness of breath during physical exertion; typical coronavirus-associated chest computed tomography (ct) changes (ct1- ct2); pulse oximetry levels spo2< 95%. able to give informed consent and attend all study visits positive pcr-test for covid-19 ≤72 hours prior to randomization the patient's ability to inhale the experimental drug participants must agree to use the reliable contraception while on study medication and for posttrial contraception for 3 month key

inclusion criteria: men or non-pregnant female aged 18 to 65 years hospitalized with moderate covid-19 infection: body temperature > 37.5 °c; respiratory rate > 22/min; shortness of breath during physical exertion; typical coronavirus-associated chest computed tomography (ct) changes (ct1- ct2); pulse oximetry levels spo2< 95%. able to give informed consent and attend all study visits positive pcr-test for covid-19 ≤72 hours prior to randomization the patient's ability to inhale the experimental drug participants must agree to use the reliable contraception while on study medication and for posttrial contraception for 3 month key