Viral disease Useful rules of thumb Comparison table of clinically important virus families and species

| Family | Baltimore_group | envelopment | Virion_shape | Replication_site |
|---|---|---|---|---|
| Adenoviridae | Group I | non-enveloped | icosahedral | nucleus |
| Herpesviridae | Group I | enveloped | complex | nucleus |
| Papillomaviridae | Group I | non-enveloped | icosahedral | nucleus |
| Polyomaviridae | Group I | non-enveloped | icosahedral | nucleus |
| Poxviridae | Group I | enveloped | complex | cytoplasm |
| Hepadnaviridae | Group VII | enveloped | icosahedral | nucleus |
| Parvoviridae | Group II | non-enveloped | icosahedral | nucleus |
| Astroviridae | Group IV | non-enveloped | icosahedral | cytoplasm |
| Caliciviridae | Group IV | non-enveloped | icosahedral | cytoplasm |
| Picornaviridae | Group IV | non-enveloped | icosahedral | cytoplasm |
| Coronaviridae | Group IV | enveloped | helical | cytoplasm |
| Flaviviridae | Group IV | enveloped | icosahedral | cytoplasm |
| Togaviridae | Group IV | enveloped | icosahedral | cytoplasm |
| Hepeviridae | Group IV | enveloped | icosahedral | cytoplasm |
| Retroviridae | Group VI | enveloped | icosahedral | nucleus |
| Orthomyxoviridae | Group V | enveloped | helical | nucleus |