K-cell
The K-cell was the primary component of the humanoid immune system that killed infected cells in the body.

In 2153, the DNA of three Human crewmembers from  became mutated by a mutagenic virus on the Loque'eque homeworld, transforming them into another species. T'Pol, who was also a member of the away team, was not drastically affected by the virus thanks to her Vulcan K-cells, which were determined by Doctor Phlox to have a neutralizing effect on the virus. Based on this information, Phlox was able to synthesize an antivirus using T'Pol's genetic profile and an active sample of her DNA. ()

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Anatomy