Blood Bank

Blood Bank is a Brotherhood of Steel repeatable quest in Fallout 4.

Detailed walkthrough
After asking Scribe Neriah for work, she will tell the Sole Survivor that she needs blood samples from the Commonwealth creatures for her research projects. The Sole Survivor is then tasked to collect viable blood samples from creatures and deliver it to Senior Scribe Neriah at the Prydwen. She will pay the Sole Survivor 50 caps per sample and she will be able to produce 6 X-111 compounds every 20 samples she is brought.