ABSTRACT
International Committee on Taxonomy named it as severe acute respiratory syndrome coronavirus-2 ( SARS-CoV-2). The first stage, which is considered as a safe stage, means no one is corona positive. The next step is the isolation stage; it occurs when cases are imported, and they need isolation. When three cases were reported in India from China, and it was a simple thing to tackle them. The third stage is the cluster stage, which is more challenging to handle than the second one because cases will increase in it. The fourth and last stage is community transmission when thousands and millions of people get the infection, which is the severe phase for the disease; in this stage the number of positive cases increases in a logarithmic way. In the late of 2019, a group of people with similar symptoms was observed by doctors in Wuhan, and they informed that some virus from bats is infecting to humans.
