| Eukaryotic virus | DNA virus | Single-stranded | Anelloviridae | Primates | Torque teno virus, Torque teno midi virus, Torque teno mini virus | Epithelial cells | Hino and Miyata, 2007; Spandole et al., 2015 |
| | | | Circoviridae | Birds and mammals | Chicken anemia virus, porcine circoviruses | Monocytes, epithelial cells, and fibroblasts | Li et al., 2010 |
| | | | Geminiviridae | Plants | Tomato yellow leaf curl virus | No evidence | Zhang et al., 2006 |
| | | | Genomoviridae | Humans, mammals, birds, and fungi | Gemycircularvirus | Unclear | Gregory et al., 2020 |
| | | | Parvoviridae | Vertebrates, insects | Human bocavirus 2-4 | Epithelial cells | Emlet et al., 2020; Guido et al., 2016 |
| | | Double-stranded | Adenoviridae | Vertebrates | Enteric adenovirus 40, 41 | Epithelial cells, fibroblasts, gut lymphocytes | Favier et al., 2004 |
| | | | Herpesviridae | Vertebrates | Human CMV, EBV | CMV: Endothelial cells, leukocytes, and monocytes; EBV: endothelial cells, B cells | Emlet et al., 2020; Gerna et al., 2004; Stanfield and Luftig, 2017 |
| | | | Iridoviridae | Amphibia, fish, invertebrates | Lymphocystis disease virus | No evidence | Gregory et al., 2020 |
| | | | Papillomaviridae | Vertebrates | Human papillomavirus 6, 18, 66 | Epithelial cells | Egawa et al., 2015; Popgeorgiev et al., 2013 |
| | | | Polyomaviridae | Mammals and birds | BK polyomavirus, JC polyomavirus, Human polyomavirus 9, 12 | Oligodendrocytes, epithelial cells | Cook, 2016; Emlet et al., 2020 |
| | | | Rudiviridae | Thermophilic archaea from Crenarchaeota | Unclassified | No evidence | Gregory et al., 2020 |
| | RNA virus | Single-stranded | Caliciviridae | Vertebrates | Human NoV, Sapovirus | Epithelial (enteroendocrine) cells, myeloid cells, and lymphoid cells in immunocompromised patients | Green et al., 2020; Karandikar et al., 2016 |
| | | | Astroviridae | Vertebrates | Human astrovirus | Enterocytes, goblet cells | Kolawole et al., 2019 |
| | | | Virgaviridae | Plants | Pepper mild mottle virus, Tobacco mosaic virus | No evidence | Colson et al., 2010; Zhang et al., 2006 |
| | | | Picornaviridae | Vertebrates | Human cosavirus, human klassevirus/ salivirus, Aichi virus, human enterovirus, human parechovirus, Saffold cardiovirus, human echovirus, human coxsackievirus, human poliovirus, hepatitis A | Epithelial cells, neuronal cells, hepatocytes | Krishnamurthy and Wang, 2018; Rivadulla and Romalde, 2020; Tapparel et al., 2013 |
| | | | Retroviridae | Vertebrates | HIV-1 | T lymphocytes, macrophages | Gootenberg et al., 2017; Virgin, 2014 |
| | | | Togaviridae | Humans, mammals, marsupials, birds, mosquitoes | Unclassified | Fibroblasts | Gregory et al., 2020 |
| | | | Coronaviridae | Vertebrates | Severe acute respiratory syndrome coronavirus (SARS-CoV), SARS-CoV-2, Middle East respiratory syndrome coronavirus (MERS-Cov) | Tracheo-bronchial epithelial cells, type 1 pneumocytes, intestinal epithelial cells | Corman et al., 2018 |
| | | | Alphaflexiviridae | Plants, fungi | Unclassified | No evidence | Gregory et al., 2020 |
| | | | Iflaviridae | Insects | Unclassified | No evidence | Gregory et al., 2020 |
| | | | Hepeviridae | Humans, pigs, wild boars, sheep, cows, camels, monkeys, some rodents, bats, and chickens | Hepatitis E virus | Hepatocytes, intestinal epithelial cells | Oechslin et al., 2020 |
| | | Double-stranded | Picobirnaviridae | Unclear: mammals or bacteria | Human picobirnavirus | No evidence | Malik et al., 2014 |
| | | | Reoviridae | Vertebrate, invertebrates, plants, fungi | Human rotavirus | Mature enterocytes | Komoto and Taniguchi, 2014 |
| Bacteriophages | DNA virus | Single-stranded | Microviridae | Bacteria | Chlamydia phage 1,3,4, Bdellovibrio phage phiMH2K, Chlamydia phage CPG1, Spiroplasma phage 4, Chlamydia phage CPAR39 | NA | Dion et al., 2020; Székely and Breitbart, 2016 |
| | | | Inoviridae | Bacteria | Unclassified | NA | Dion et al., 2020; Székely and Breitbart, 2016 |
| | | Double-stranded | Myoviridae | Bacteria, archaea | phiBCD7, Bacillus phage G, phiP-SSM4 | NA | Barylski et al., 2020; Gregory et al., 2020; Guerin et al., 2018; Yutin et al., 2018 |
| | | | Siphoviridae | Bacteria, archaea | Listeria phage A118, phiE125, Lactococcus phage bIL285, phiCP39-O, Clostridium phage phiCP39-O, Mycobacterium phage Athena, phage PA6, phage SM | NA | Barylski et al., 2020; Gregory et al., 2020; Guerin et al., 2018; Yutin et al., 2018 |
| | | | Podoviridae | Bacteria | Enterobacteria phage P22, phage T3 | NA | Barylski et al., 2020; Gregory et al., 2020; Guerin et al., 2018; Yutin et al., 2018 |
| | | | crAss-like phages | Bacteria | P-crAssphage | NA | Barylski et al., 2020; Gregory et al., 2020; Guerin et al., 2018; Yutin et al., 2018 |
| | RNA virus | Single-stranded | Leviviridae | Bacteria | Enterobacteria phage MS-2 | NA | Callanan et al., 2018 |
| | | Double-stranded | Cystoviridae | Bacteria | Pseudomonas phage | NA | Callanan et al., 2018 |