Nidovirusi su jednolančani RNK virusi s pozitivnim osjećajem. Nazvani su latinskimNidus, što znači gnijezdo, jer svi virusi ovog reda stvaraju 3 'ko-terminalni ugniježđen skup subgenomskih mRNK tijekom infekcije.
↑Enjuanes, Luis; Sola, Isabel; Zúñiga, Sonia; Almazán, Fernando. 2008. Coronavirus Replication and Interaction with Host. Mettenleiter, Thomas C.; Sobrino, Francisco (ur.). Animal Viruses: Molecular Biology. Caister Academic Press. ISBN978-1-904455-22-6
↑Volker Thiel, ur. 2007. Coronaviruses: Molecular and Cellular Biology. Caister Academic Press. ISBN978-1-904455-16-5
↑Balasuriya, Udeni; Snijder, Eric J. 2008. Arteriviruses. Thomas C. Mettenleiter and Francisco Sobrino (ur.). Animal Viruses: Molecular Biology. Caister Academic Press. ISBN978-1-904455-22-6