SARS-CoV2 is a new form of β‐coronavirus that has been recently discovered and is responsible for COVID 19 pandemic. The earliest infection can be traced back to Wuhan, China. From there it has spread all over the world. It is considered to have a zoonotic origin in bats and has resulted in human to human transmission. SARS-CoV2 is considered to be a strain of SARS-CoV that has a high rate of pathogenicity and transmissibility. It has been documented that the total number of confirmed cases and deaths in Europe is comparatively significant than other parts of the world. Thus, keeping in view the above perspective, an attempt is made in order to find out the epidemiological pattern of COVID 19 pandemic, if any, in different geo-climatological regions of the world in terms of case incidence and mortality. This study is also an endeavor to review and analyze the gradual changes of the genetic makeup of SARS CoV from evolutionary and epidemiological perspectives.
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