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).
Retrieved 31 March 2020.</ref> Its genome is connected to a DNA circovirus, which typically affects birds and pigs, and an RNA tombusvirus, which infects plants. The study astonished scientists, as DNA and RNA viruses differ and the chimera's assembly was not comprehended.BioMed Central Limited (18 April 2012).