| FIV | feline immunodeficiency; forced inspiratory volume |
|---|---|
| FLV | feline leukemia virus; Friend leukemia virus |
| FPV | feline pseudoleukopenia virus; fowl plague virus |
| CID | cellular immunodeficiency; charge injection device; chick infective dose; combined immunodeficiency ... |
| HEV | health and environment; hemagglutinating encephalomyelitis virus; hepatitis E virus; hepato-encephal... |