Zoonotic origins of Coronavirus (Covid-19) in light of SARS-CoV and MERS-CoV

Cases of unknown pneumonia were increasingly reported in China in late 2019, causing a serious start to 2020 with a pandemic called Covid-19 which has negatively affected humans and claimed the lives of people of all ages, especially the elderly and those with existing illnesses. Since this is not the first known coronavirus, it is necessary to examine the first ones and their characteristics which have not shown much difference with the current Covid-19 in terms of the main symptoms and modes of transmission.Scientists and researchers are trying to unravel the origin story, regarding the species that passed it on to humans, as knowing how one pandemic emerged is a key point in stopping the next. According to a number of studies and researches, this article suggests that the virus is very likely to originate from bats and infect an intermediate animal (probably pangolins) in the same way that the SARS epidemic was transmitted from bats to civets before it infect humans, and that of MERS in which the virus wasoriginally passed from bats to camels and then to humans..However, it is important to note that not all bat species are suspected, and studies point out that animals are likely to harbor a virus and transmit it to a human who can also infect their species via the route. transmission.