Retrieved 31 March 2020.</ref> Its genome is related  to a DNA circovirus, which usually infect birds and pigs, and a RNA tombusvirus, which infect plants. The study surprised scientists, because DNA and RNA viruses vary and the way the chimera came together was not understood.BioMed Central Limited (18 April 2012).
The data was retrieved on 31 March 2020.</ref> The subject's genome is linked to a DNA circovirus that primarily affects birds and pigs, as well as an RNA tombusvirus that infects plants. This discovery surprised scientists because of the differences between DNA and RNA viruses and how this chimera came together.BioMed Central Limited (18 April 2012).