SARS-CoV-2, SARS and MERS: Three formidable coronaviruses which have originated from bats

The recent continuously emerging rampancy of novel coronavirus (SARS-CoV-2) that started in Wuhan in late December 2019 has become an international public health emergency and is still spreading rapidly in the world. Up to October 11, 2020, 37.109.6851 confirmed cases of COVID-19 have been announced with 2.8 percent death, which means 1.070.355 confirmed death cases. At the moment, a specific vaccine or drug for the new coronavirus is not available; thus, the development of a drug with far-reaching HCoV inhibitory activity is an urgent medical need. It is, however, vital to first comprehend the nature of this family and other coronaviruses that have caused the outbreak. Here, we relate the epidemiological and virological characteristics of the COVID-19, SARS, and MERS rampancy.