Since the dawn of time, several viral epidemics have swept the globe, among them the current COVID-19 outbreak. The ongoing emergence and propagation of novel viral illnesses have compelled researchers to seek new therapeutic approaches that can get beyond the drawbacks of antivirals that are available right now. Medicinal plants have historically offered treatments for a range of illnesses. These bioactive compounds serve as the foundation for many "modern" pharmaceuticals. One of the essential polyphenols in various medicinal plants is Chlorogenic acid (CA), an ester of caffeic and quinic acid. Extensive research has revealed that CA possesses anti-inflammatory, anticarcinogenic, and antioxidant properties. This review aims to briefly summarise CA and its derivative's antiviral properties on various human viral diseases and their ability to fight the current COVID-19 disease. This review summarises CA antiviral action on the following viruses: influenza A virus (H1N1/H3N2/H7N9), hepatitis C virus (HCV) and hepatitis B virus (HBV), human immunodeficiency virus (HIV), infectious bronchitis virus (IBV), porcine reproductive and respiratory syndrome virus (PRRSV), herpes simplex virus (HSV)-1, enterovirus 71 (Ent 71), adenoviruses (AdenV), and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). This review will open the way for developing and designing potentially effective and broad-spectrum CA-based antiviral medicines.
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