Abstract
Coronavirus disease 2019 (COVID-19) is a novel life-threatening infectious respiratory disease and a pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) that belongs to the coronavirus family. COVID 19 was declared a Public Health Emergency of International Concern by the World Health Organization on 30 January 2020. The virus first reported in Wuhan, China, in December 2019. An impaired immune response is one of the factors that play a role in its pathogenesis and results in poor outcomes of COVID-19 patients. Currently, there is no effective antiviral medication to prevent or treat COVID-19. There have been many studies on potential conventional medicines used as antivirals. However, the outcomes of these studies showed that the drug candidates were not significantly effective against the disease. Natural products from medicinal plants with known safety profiles are a promising source for the discovery of potential treatment. Currently, people believe that taking herbal immune boosters and related products can prevent and even successfully treat COVID-19. Such tropical plants with antiviral properties and immunomodulatory activities can be great sources of treatment for COVID-19 as well as being utilized as complementary to allopathic treatment to improve recovery and the quality of life of patients. This review discusses some medicinal plants, including Allium sativum, Allium cepa, Adansonia digitata, Azadirachta indica, Momordica charantia, Psidium guajava and Moringa oleifera which are considered for the treatment of COVID-19, coupled with the need for research institutions to collaborate to search for preventive and or cure for COVID-19.
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