In nature , viruses carrying mutations might weeded natural selection might persist lab dishes even feeble viruses ’ fight hard survival.Clinching case nature But researchers compared SARS-CoV-2 coronaviruses recently found nature , including bats pangolins. “ It looks like SARS-CoV-2 could mix bat pangolin viruses , ” Garry says.Viruses , especially RNA viruses coronaviruses , often swap genes nature.Finding genes related pangolin viruses especially reassuring viruses ’ genetic makeup ’ known SARS-CoV-2 ’ discovery , making unlikely anyone working lab , says.Coronaviruses infect pangolins gave researchers important clues SARS-CoV-2 virus natural.2630ben/iStock/Getty Images Plus In particular , pangolins also amino acids cause tight binding spike protein ACE2 , team found .