The Valakians are a humanoid species native to the planet Valakis. They share the planet with the Menk.
In the 22nd century, a plague broke out and 12 million Valakians died. They deployed several ships to seek help.
The NX-01 Enterprise offered to help to find a cure. Dr. Phlox discovered that the Menk could become the dominant species and refused to help. The crew gave drugs to the Valakians to ease the symptoms of the disease.