Advance

Vaccination

vaccination_advance

With the development of vaccines, physicians are able to provide the populace with immunity against deadly diseases. These vaccines are helping to reduce the spread of disease and prevent epidemics. By injecting a small amount of weakened or dead bacteria or virus into the body, the immune system is able to recognize and fight off the disease if it ever encounters it again.

Advance tree

It has no requires, so the game files don’t say where this goes. When the game builds the Revolutions tree, it adds this at the end of a branch with room for it, in the same spot in every campaign.