Answer:
Vaccines have been around since 1796 preventing people from diseases and decreasing death rates. I believe due to the modern vaccines and medicine people have been living longer than life expectancies in the 1700's and 1800’s, which was between 30 and 40 years. Vaccines train the human body to recognize viruses or bacteria and the antigens (molecule capable of inducing an immune response) will start attacking the virus or bacteria before it tries to spread and cause sickness once it is has recognized it. However, vaccines are not always 100% safe because they can come with side effects. For example, the Hepatitis B vaccine had a severe allergic reaction, called anaphylaxis which caused difficulty breathing, dizziness, and skin rashes for a few people.
I believe the answer your looking for is the "frontal" lobe, though this is if you just want the lobe of the brain. The frontal lobe is responsible for giving the traits that define our personality and who we are are. If you want to be specific though it is, I think the "Amydalga" is the more specific answer
Answer:
your body matures and gets losses interest
Explanation: