Inclusion Criteria:  Patients over the age of 18 years RT-PCR positive for COVID 19  Patients diagnosed with the following pulmonary pathology:  Pneumonia Pulmonary edema Bronchitis Acute asthmatic attack Emphysema Or Normal (e.g. asymptomatic patients)  The diagnosis is confirmed if possible, by:  Anamnesis Physical examination X-ray Suggestive blood test - CBC Pulse oximetry  Exclusion Criteria:  Pregnant women Chest malformation Unconsciousness Subject that need a guardian Weigh above 150 Kg. Patients with current shortness of breath Patients currently assisted by breathing machine such as CPAP or other