| FVP | Friend virus polycythemia |
|---|---|
| LLV-F | lymphatic leukemia virus, Friend associated |
| HEV | health and environment; hemagglutinating encephalomyelitis virus; hepatitis E virus; hepato-encephal... |
| SFV | Semliki Forest virus; shipping fever virus; Shope fibroma virus; squirrel fibroma virus |
| Th cell | helper T cell(= T4 cell) |