This list includes 14 Viruses that start with F that start with F, from “Feline calicivirus” to “Frog virus 3”. These viruses range from well-known human pathogens to mainly animal viruses, many relevant in veterinary and zoonotic contexts. They are central to clinical diagnosis, public health surveillance, veterinary care, and virology research.

Viruses that start with F are viral species and strains whose standard names begin with the letter F. A notable example is Feline calicivirus, long studied for feline respiratory disease and vaccine development.

Below you’ll find the table with the columns: Virus, Classification, Affects humans?, Symptoms, and Transmission.

Virus: The official name helps you find each entry quickly and cross-reference databases, articles, or clinical reports.

Classification: ICTV family, genus, and species show where the virus fits in accepted taxonomy for research and comparison.

Affects humans?: A clear Yes/No with a brief qualifier tells you if the virus infects people and notes zoonotic or opportunistic behavior.

Symptoms: Typical clinical features in five to ten words help you recognize common presentations at a glance.

Transmission: Main routes of spread are listed succinctly so you understand how infections pass between hosts or species.

Viruses that start with F

NameClassification (Family/Genus/Species)Affects humans?Transmission method
Flu (influenza A virus)Orthomyxoviridae / Alphainfluenzavirus / Influenza A virusYes – human pathogenRespiratory droplets
Foot-and-mouth disease virusPicornaviridae / Aphthovirus / Aphthovirus A (Foot-and-mouth disease virus)No – primarily animalDirect contact, aerosols
Feline immunodeficiency virusRetroviridae / Lentivirus / Feline immunodeficiency virusNo – no human casesBite wounds (saliva)
Feline leukemia virusRetroviridae / Gammaretrovirus / Feline leukemia virusNo – no human casesSaliva, close contact
Feline calicivirusCaliciviridae / Vesivirus / Feline calicivirusNo – no human casesRespiratory droplets, contact
Feline coronavirusCoronaviridae / Alphacoronavirus / Alphacoronavirus 1No – primarily catsFecal–oral, oral–nasal
Feline herpesvirus 1Herpesviridae / Varicellovirus / Feline alphaherpesvirus 1No – no human casesRespiratory droplets, contact
Feline panleukopenia virusParvoviridae / Protoparvovirus / Carnivore protoparvovirus 1No – no human casesFecal–oral, fomites
Feline morbillivirusParamyxoviridae / Morbillivirus / Feline morbillivirusNo – no human casesClose contact, body fluids
Flock House virusNodaviridae / Alphanodavirus / Flock House virusNo – insect virusOral (insects), lab inoculation
Fowlpox virusPoxviridae / Avipoxvirus / Fowlpox virusNo – rare zoonosisInsect bites, direct contact
Foamy virus (Prototype foamy virus)Retroviridae / Spumavirus / Prototype foamy virusYes – zoonoticBody fluids
Friend virusRetroviridae / Gammaretrovirus / Murine leukemia virusNo – mice onlyBlood, vertical (mice)
Frog virus 3Iridoviridae / Ranavirus / Frog virus 3No – amphibians onlyWaterborne, direct contact

Descriptions

Flu (influenza A virus)
Seasonal respiratory virus causing fever, cough and body aches; infects humans, birds and pigs and can cause severe pneumonia in vulnerable people.
Foot-and-mouth disease virus
Highly contagious livestock virus of cloven-hoofed animals causing fever, blisters and lameness; major agricultural impact, rare human cases.
Feline immunodeficiency virus
Lentivirus of cats transmitted mainly by biting; causes chronic immune suppression, weight loss and opportunistic infections in infected cats.
Feline leukemia virus
Retrovirus of cats that can cause leukemia, lymphoma and anemia; spreads through grooming, bites and shared bowls.
Feline calicivirus
Common cause of feline upper respiratory disease and oral ulcers; causes sneezing, drooling and sometimes systemic illness in cats.
Feline coronavirus
Widespread in cats; most infections mild but certain strains can mutate to cause feline infectious peritonitis (FIP), a fatal immune-mediated disease.
Feline herpesvirus 1
Alphaherpesvirus causing feline viral rhinotracheitis; signs include sneezing, eye ulcers and nasal discharge in cats.
Feline panleukopenia virus
Highly contagious parvovirus of cats causing fever, vomiting, severe diarrhea and dangerous white blood cell loss, especially in kittens.
Feline morbillivirus
Recently described virus in cats linked to kidney disease and respiratory signs; its role in feline illness is under investigation.
Flock House virus
Insect-infecting nodavirus used widely in research; infects fruit flies and mosquitoes and is a model in molecular virology.
Fowlpox virus
Avian poxvirus causing skin lesions and diphtheritic disease in poultry; reduces egg production; very occasional, mild human infections reported.
Foamy virus (Prototype foamy virus)
Spumaviruses include simian foamy viruses that can infect humans exposed to primates; generally asymptomatic and not linked to clear human disease.
Friend virus
Research strain complex of murine leukemia viruses that causes leukemia in mice; widely used as a model for cancer and immune studies.
Frog virus 3
Ranavirus responsible for mass die-offs in frogs, salamanders and turtles; causes skin ulceration, hemorrhage and high mortality in amphibian populations.
If you think there is a missing term, let us know using the contact form.