aeration; artificial ventilation; asthma; chronic obstructive lung disease; controlled study; coronavirus disease 2019; diagnostic accuracy; diagnostic test accuracy study; disease severity; drug efficacy; echography; editorial; end tidal carbon dioxide tension; forced expiratory volume; gas exchange; human; noninvasive ventilation; physiotherapy; short term memory; spirometry; vocal cord disorder; methacholine; nasal cannula; oxygen concentrator; sensor; ventilator