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Little is known about the mechanism of coronavirus disease 2019 (COVID-19)-induced critical illness and death. The host infection mediated by SARS-CoV-2 is mainly relied on ACE2 receptor. There is still a lack of clinical data about the effects of interaction of ACE2 and SARS-CoV-2 on RAS system and disease progression. We investigated the plasma angiotensin II (Ang II) and renin levels in 82 non-hypertensive patients (42 mild cases, 25 severe cases, and 15 critically ill cases) infected by SARS-CoV-2 and 12 critically ill patients not infected by SARS-CoV-2 serving as control.
Wu et al. (Fri,) studied this question.