Inoculation is a set of methods of artificially inducing immunity against various infectious diseases. The terms "inoculation", "vaccination", and "immunization" are often used synonymously, but there are some important differences among them. Inoculation is the act of implanting a disease inside a person or animal, vaccination is the act of implanting or giving someone a vaccine specifically, and immunization is what happens to the immune system as a result.
In 1943, during the Second World War, Japan dropped fleas infected with the plague and containers of anthrax over AmericanHonolulu,[1]. However the U.S. quickly began a mass inoculation program, which blunted Japan's attacks.[2]
*=denotes a character who was a POV for a single scene
1=denotes a character who was a POV for one volume
2=denotes a character who was a POV for two volumes
3=denotes a character who was a POV for three volumes
4=denotes a character who was a POV for four volumes
5=denotes a character who was a POV for five volumes
6=denotes a character who was a POV for six volumes
† denotes a deceased character.