COVID-19 is a family of Severe Acute Respiratory Syndrome (SARS) as CoV-2. Till 1-May-2020, even more than 3.26 million people have been positively reported across 187 countries as well as territories, which resulted in more than 233,000 deaths and more than 1.02 million cases have been recovered. The lungs are the most affected organ due to COVID-19 because of this virus admittance host cells via enzymes. This virus also affects the gastrointestinal organs that indirectly affect the small intestine [1]. It has been named coronavirus because it looks like halos (also known as coronas) while having viewed through a microscope. Figure 1 shows the virion compositional structure that showing spikes as a "crown" [2].The virus is mainly spread among people during close contact, often through droplets or sneezing. People can also be infected by coming in the contact with contaminated surfaces and then touching their faces. It is the most contagious especially during the first three days, although symptoms of the disease may appear and spread in later stages of the disease. Chest CT imaging is a helpful technique for diagnosis. Figure 2 shows the common symptoms of coronavirus-infected people and biological changes in the human body.
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