In the amygdala, which is part of the brain that is linked to fear, and lower activity in the prefrontal cortex.
Part of the brain involved in reasoning and decision making.
The action of an incentive in the performance of an organism
<span>After immunizations, the weakened vaccine viruses or bacteria replicate (grow) in the vaccinated person. This means a relatively small dose of virus or bacteria can be given in order to stimulate an immune response.</span>