Brain Eating Amoeba
Transmission: The parasite is transmitted through water getting into the brain through the nose.
People Exposed: Anybody exposed to to the contaminated water can get get infected. However it is not contagious.
Damage: Loss of ability to perform normal brain function.
Prevention: Clean public water that has been decontaminated.
Treatments: There are a number of drugs used to kill the parasite but even when medicated, most people still die.