C...........................................................................................................
Answer:
C
Explanation:
It must be prescribed by a doctor
Vaccination has been one of the most successful developments of medical science because for centuries it has been proven effective in diminishing the number of people at risk on certain kinds of diseases. How does vaccination help? Vaccines are contained weakened organisms that are injected to the body. This then boosts the immune system as they release a certain type of cells to combat with the foreign organisms. When the person is exposed to the same organisms again, he/she will develop immunity.
The only possible answer is A; however, brain decay is not only seen in the frontal lobe, the temporal lobe is affected and the brain has less gray matter in schizophrenic patients.