| FLV | feline leukemia virus; Friend leukemia virus |
|---|---|
| FPV | feline pseudoleukopenia virus; fowl plague virus |
| GLV | gibbon ape leukemia virus; Gross leukemia virus |
| GV | gastric volume; gas ventilation; gentian violet; germinal vesicle; granulosis virus; griseoviridan; ... |
| HAV | hemadsorption virus; hepatitis A virus |