The world is alarmed disease is caused by the  Severe acute respiratory syndrome corona virus-2 (SARS CoV-2). It belongs to the betacoronavirus family. The Covid-19 posses a spherical or pleomorphic structure. The outer envelope have club-shape glycoprotein and the capsid have protein matrix. It contains single stranded RNA as the genetic material associated with nucleoproteins.

Covid-19 is found to be a animal virus. The mode of transmission is mainly through the aerosols or droplets from the infected patients. The virus attaches to the host cell with glycoproteins. The virus infects the respiratory tract and damages the lungs. In severe cases it also damages other organs like brain and affect sensory function.