Role of natural drugs in severe acute respiratory syndrome coronavirus 2: potential beneficial effects in prevention or prior treatment in elderly and cancer patients

Abstract

In 2019, a new coronavirus, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), aroused the attention of the entire world. It causes an acute respiratory disease, by involving the same receptor, i.e. the angiotensin-converting enzyme 2, as that for severe acute respiratory syndrome coronavirus (SARS-CoV), mainly spreads through the respiratory tract. The clinical symptoms in patients with of SARS-CoV-2 include fever, cough, dyspnea, fatigue and in a small percentage of patients also gastrointestinal symptoms have been reported...