Flu (disambiguation)
- Avian flu
- Cat flu
- DBU Bredde
- Dog flu
- Equine flu
- FLU (plant gene)
- Federation of Hong Kong and Kowloon Labour Unions
- Flew (disambiguation)
- Flu
- Flu (film)
- Flu Press
- Flu-like illness
- Flue
- Fluent Form
- Fluminense FC
- Flushing Airport
- Grippe (disambiguation)
- Haemophilus influenzae
- Human flu
- Influenza (disambiguation)
- Influenza A virus subtype H5N1
- Influenza virus
- Influenza-like illness
- LFU (disambiguation)
- LUF (disambiguation)
- Man flu
- Stomach flu
- Swine flu
- The Flu (Parks and Recreation)
- The Flu (The Golden Girls)
- UFL (disambiguation)
- ULF (disambiguation)