Yet now, researchers have been observed three different pathogenic human coronaviruses (CoVs), such as Middle East respiratory syndrome coronavirus (MERS-CoV), severe acute respiratory syndrome coronavirus (SARS-CoV), and a 2019 novel coronavirus (COVID-19) [1-3]. Among them, recently, the people of the world faces the biggest challenges of COVID-19 in relation to health issue. This COVID-19 has transmitting exponentially throughout the globe. Coronaviruses are relatively large in size occupying single-stranded positive-sense RNA genome enclosed in a membrane envelope.
In fact, this coronavirus is composed of four structural proteins, including spike (S), envelope (E), asamembrane (M), and nucleocapsid (N) proteins [2, 4, and 5]. Spike (S) protein is very crucial in connection of viral attachment, fusion and entry and this protein can be utilized to develop antibodies, entry inhibitors and vaccines [1, 6-12]. Human pathogenic coronaviruses (severe acute respiratory syndrome coronavirus [SARS-CoV] and SARS-CoV-2) bind to their target cells through angiotensin-converting enzyme 2 (ACE2), which is recognized by epithelial cells of the lung, intestine, kidney, and blood vessels [13]. Angiotensin-converting enzyme 2 (ACE2) is a membrane bound amino peptidase that effects on cardiovascular and immune systems [14]. Some literature [15, 16] mentioned that this virus effects in the lower respiratory system which is responsible for viral pneumonia. In addition to that, it may also deteriorate the conditions of the gastrointestinal system, heart, kidney, liver, and central nervous system leading to several organ damages. Following the adverse impact of a pandemic, researchers have been trying to realize nature of this new virus and the pathophysiology of this virus to seeking the probable treatment process and searching out the reasonable therapeutic agents and vaccines. There are several attempts have been taken to find out the recovery system even though, there are no SARS-CoV-2-specific antiviral agents [17].
In this study, research has been carried out to find out the possible mechanisms to save the lives of people and produce the vaccines and drugs for future prevention.
The practice of using medicinal plants to treat human skin including healing of wounds and burn injuries, antifungal, antiviral, antibacterial applications against skin infections has long history and is going on for primary healthcare even in the modern age [18-20].
Usages of metal nanoparticles like as silver, zing in the existing wound dressing materials is not environment friendly due to its toxicity effect [18]. The altrtnative environment friendly similar materials such as licorice, neem, turmeric, honey, nigella etc. natural herbs have significant effect due to their inherent biomedicinal properties. As a result, the development of electrospun nanofibrous membrane by electrospinning technique from natural polymers is considered as novel approach in biomedical applications such as wound dressing, tissue engineering and drug delivery, leads to contemporary research field.
Synergistic effects of licorice on nanofibrous membrane have not yet been studied thoroughly. Thus, the newness of the present study is to fabricate nanofibrous membrane with licorice extract to explore its antibacterial and antiviral medicinal properties also.