In December 2019, a new type of coronavirus called COVID-19 was identified as an unknown cause of pneumonia in Wuhan, China. The pandemic virus was transmitted to humans from a type of seafood that could spread significantly among humans in a short time. Clinical signs of coronaviruses include fever, severe sweating, cough, pneumonia, and a weakened immune system, with acute cases leading to death. One of the most important coronavirus receptors in the host cell is the angiotensin 2 converting enzyme. It is noteworthy that the patient’s recovery process increases during the inhibition of angiotensin 2 converter enzyme. Therefore, the administration of drugs that inhibit this enzyme can be effective in recovering a patient with coronavirus. Flavonoids are one the inhibitors of the angiotensin-converting enzyme, which is abundant in fruits and vegetables. Fistula, a type of flavonoid known in nature as an antioxidant and anti-inflammatory agent in the treatment of many, can be effective in the treatment of coronavirus by inhibiting the enzyme converter angiotensin 2.

Keywords: Angiotensin Converting Enzyme, Coronavirus, Flavonoid, Fisetin

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