Assertion: lung | /r/HasAspect | cell
Facets:
Source sentences:
text: Smokers and people with COPD have also been identified as being at higher risk of infection and severe disease because their lungs and lower respiratory tract have cells showing a higher “expression” of ACE2, the portion of a cell through which the Sars-Cov-2 invades it, according to a study by the European Respiratory Journal.