Neubilean fever
A deleted scene from the  third season episode  established the Neubilean fever as a type of fever. In 2154, eight crewmembers aboard a particular version of  from an alternate timeline were suffering from low-grade Neubilean fever. As a result, Doctor Phlox wanted to vaccinate everyone aboard both that ship and the Enterprise from the prime universe.

See also
Neubilia Prime

Deleted material