Board Thread:Lore Discussion/@comment-2165692-20150421113553/@comment-26440657-20150710180346

In real life it should be detectable through science... DNA testing etc. There has to be some traces of the virus / whatever it is that makes you able to transform.

In fiction it's pretty much like an on off switch. One minute you are a werewolf then the next minute you are human again without any hint at all that you were / could become a werewolf. Add the fact that you can transform into werewolf / vampire lord form even if you are wearing full armor  (The armor disappears in monster form) then you can transform back to human form with the full armor...