Type of germ
Location in people
Nose, throat, brain, nervous system, bloodstream
Location in the game
Brain/nervous system, lungs, circulatory system/blood

Hero cards with power against this germ:

Good: Martinus Beijerinck, Robert Koch, Walter Orenstein, Paul Offit

Better: Simon Flexner

Best: Maurice Hilleman

Find out more about this germ and the vaccines that prevent it on the Vaccine Education Center site:
A look at each vaccine: Meningococcus
Meningococcus: What you should know