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Virus classification
Group: Group I (dsDNA)
Order: Unassigned
Family: Pandoraviridae
Genus: Pandoravirus

Pandoravirus is a genus of very large viruses, with the largest genomes of any viral genus.[1] Like the other very large viruses Mimivirus, Pithovirus and Megavirus, Pandoravirus infects amoebas. Its genome, with 1.9 to 2.5 megabases of DNA, is twice as large as that of Megavirus.[2] It differs greatly from the other large viruses in appearance and in genome structure.[3]

Although the capsid of Pithovirus is 50% larger in size,[4] Pandoravirus has the largest genome among all viruses.[3]


  1. Yong, Ed (2014). "Giant virus resurrected from 30,000-year-old ice: Nature News & Comment". Nature. doi:10.1038/nature.2014.14801 .
  2. A megabase is a million base pairs of nucleic acids.
  3. 3.0 3.1 Brumfiel, Geoff (18 July 2013). "World's biggest virus may have ancient roots". National Public Radio. Retrieved 18 July 2013.
  4. Sirucek, Stefan (3 March 2014). "Ancient "giant virus" revived from Siberian permafrost". National Geographic.