Bloodstream
From Tardis Wiki, the free Doctor Who reference
In 2015, according to Dr Harry Sullivan, David Daniels possessed a metagenic compound in his bloodstream that was acting as an antivirus against the HIV. (PROSE: Damaged Goods)
In the early 2020s, Adam Lang's bloodstream had been infected with an alien pathogen, later identified as Praxeus. (TV: Praxeus)
