Zombieland v1.16.0
Zombieland v1.16.0 introduces zombie serum.
You can collect zombie extract in small amounts from dead zombies and refine it on a drugtable into zombie serum (requires 1x medicine too). The serum comes in qualities of 10% to 100% and they require different amounts of zombie extract. One potion of serum heals one zombie bite and the quality determines the failure risk when doing an operation on an infected colonist. Colonists that are scheduled to do doctor tasks automatically collect zombie extract if there are no zombies nearby but you can order them too.
Enjoy!