EFV may refer to:
- Expeditionary Fighting Vehicle, an amphibious assault vehicle developed by General Dynamics
- Equine foamy virus, virus in the genus Equispumavirus
- Ecole Française de Vilnius, a French international school in Vilnius, Lithuania
- Efavirenz, an antiretroviral medication used to treat and prevent HIV/AIDS
This disambiguation page lists articles associated with the title EFV.
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