Vortron radiation
From Tardis Wiki, the free Doctor Who reference
Caused by rifts in time, Vortron radiation made humans ill. It is unknown if humanoids like Time Lords were affected or how greatly. It could be remedied by a concotion of several vegetables and knowledge of this radiation. The Eleventh Doctor developed a cure for Poseidon 8's crew. (VG: Shadows of the Vashta Nerada)