Research carried out by the University of Pennsylvania (United States) ensures that the coronavirus of the SARS-CoV-2 type, which causes covid, has been in bats for at least 40 to 70 years, because these animals are affected by a type of coronavirus that shares more than 96% of the genome with which it has become pandemic in the world.
Three techniques were used to identify when the SARS-CoV-2 and the RaTG 13 coronavirus lineage separated, and it was determined that it would have occurred at least three times: 1948, 1969 and 1982, as mentioned The vanguard.
Even in the study, published in Nature Microbiology, the possibility that there are more lineages or types of coronaviruses that could affect people is mentioned.
"It will be difficult to identify a virus with the potential to cause major outbreaks in humans before they emerge," say the authors. That is why they recommend having a real-time surveillance system for diseases that affect people to "identify and classify pathogens."
The conspiracy theory that SARS-CoV-2 was created in a laboratory in China was also discarded in this investigation. "If the virus had escaped from a laboratory setting, the first affected individuals would have been the center's employees and their families. We didn't see this in the original 44 cases from the end of December 2019. ” It was also rejected that the virus had been in Barcelona's wastewater in March of that year. (I)