Virus Families

All virus families as of September 2026, including genome, class, enveloped status, and capsid shape

Adenovirus genome

Double stranded linear DNA

Adenovirus class

I

Adenovirus envelope and capsid

Naked icosahedral

Baculovirus genome

Double stranded circular DNA

Baculovirus class

I

Baculovirus envelope and capsid

Helical enveloped

Herpes genome

Double stranded linear DNA

Herpes class

I

Herpes envelope and capsid

Enveloped icosahedral

Iridovirus genome

Double stranded linear DNA

Iridovirus class

I

Iridovirus envelope and capsid

Icosahedral; enveloped or naked

Papillomavirus genome

Double stranded circular DNA

Papillomavirus Class

I

Papillomavirus envelope and capsid

Naked icosahedral

Polyomavirus genome

Double stranded circular DNA

Polyomavirus class

I

Polyomavirus envelope and capsid

Naked icosahedral

Poxvirus genome

Double stranded linear cross-linked DNA

Poxvirus class

I

Poxvirus envelope and capsid

Enveloped complex

Circovirus genome

Single stranded circular DNA

Circovirus class

II

Circovirus envelope and capsid

Naked icosahedral

Parvovirus genome

Single stranded linear DNA

Parvovirus class

II

Parvovirus envelope and capsid

Naked icosahedral

Birnavirus genome

Double stranded linear RNA with 2 segments

Birnavirus class

III

Birnavirus envelope and capsid

Naked icosahedral

Reovirus genome

Double stranded linear RNA with 10-18 segments

Reovirus class

III

Reovirus envelope and capsid

Naked icosahedral

Calicivirus genome

Positive single stranded linear RNA

Calicivirus class

IV

Calicivirus envelope and capsid

Naked icosahedral

Coronavirus genome

Positive single stranded linear RNA

Coronavirus class

IV

Coronavirus envelope and capsid

Enveloped helical

Flavivirus genome

Positive single stranded linear RNA

Flavivirus class

IV

Flavivirus envelope and capsid

Enveloped icosahedral

Picornavirus genome

Positive single stranded linear RNA

Picornavirus class

IV

Picornavirus envelope and capsid

Naked icosahedral

Togavirus genome

Positive single stranded linear RNA

Togavirus class

IV

Togavirus envelope and capsid

Enveloped icosahedral

Arenavirus genome

Negative single stranded linear RNA with 2 segments

Arenavirus class

V

Arenavirus envelope and capsid

Enveloped helical

Bunyavirus genome

Negative single stranded linear RNA with 3 segments

Bunyavirus class

V

Bunyavirus envelope and capsid

Enveloped helical

Filovirus genome

Negative single stranded linear RNA

Filovirus class

V

Filovirus envelope and capsid

Enveloped helical

Orthomyxovirus genome

Negative single stranded linear RNA with 8 segments

Orthomyxovirus class

V

Orthomyxovirus envelope and capsid

Enveloped helical

Paramyxo genome

Negative single stranded linear RNA

Paramyxovirus class

V

Paramyxovirus envelope and capsid

Enveloped helical

Rhabdovirus genome

Negative single stranded linear RNA

Rhabdovirus class

V

Rhabdovirus envelope and capsid

Enveloped helical

Retrovirus genome

Positive single stranded linear RNA with 2 copies

Retrovirus class

VI

Retrovirus envelope and capsid

Enveloped icosahedral

Hepadnavirus genome

Double stranded DNA in a gapped circle

Hepadnavirus class

VII

Hepadnavirus envelope and capsid

Enveloped icosahedral

Class I Baltimore definition

Double stranded DNA

Class II Baltimore definition

Single stranded DNA

Class III Baltimore definition

Double stranded RNA

Class IV Baltimore definition

Positive single stranded RNA

Class V Baltimore definition

Negative single stranded RNA

Class VI Baltimore definition

Reverse-transcribing virus with single stranded RNA

Class VII Baltimore definition

Reverse-transcribing virus with double stranded DNA

Class I virus families

Adeno, baculo, herpes, irido, papilloma, polyoma, pox

Class II virus families

Circo, parvo

Class III virus families

Birna, reo

Class IV virus families

Calici, corona, flavi, picorna, toga

Class V virus families

Arena, bunya, filo, orthomyxo, paramyxo, rhabdo

Class VI virus families

Retro

Class VII virus families

Hepadna