Oh, infected persons who have been cured will definitely KNOW who the alien creatures are. Could this be a problem? Possibly. Except that the alien creatures can also say that THEY have just been cured and know the identity of the alien creatures... conflict
Also, no one knows just how many are susceptible... and the original Thing cannot be cured - his genome is much closer to the original Alien Creature.
Don't forget Alien Creatures special ability to attack twice in a night if it's the remaining Thing. Lynching comes first before attacks.
Updated:
Researchers: Using an antidote, can turn an infected human back into human again and who can no longer be infected. Alien Creatures will know when an infected human has been cured. Using an antidote on a Susceptible or normal Human has no effect.
Both cured humans and Alien Creatures will be informed by PM at the same time.
For players with more than one role, their MAJOR role counts towards the win, their minor role does not.