Vaccination is a process of injecting a dead or weakened form of a germ into the body. how does this strengthen the immune system?
it allows the body to increase its internal temperature.
it allows the body to regulate the inflammation response.
it allows the body to keep germ information for future infections.
it allows the body to increase its desire to eat healthy food.

Normally, when you are infected with a pathogen like a virus, your body responds with a series of reactions. When your body realizes there is an invader, an immune response occurs. This means that the body begins to produce proteins called antibodies that help to destroy the pathogens that can make you sick. After you are better, the antibodies stick around and are there to protect you against future infections. A vaccine works by injecting you with dead or inactive viruses so you will naturally produce antibodies and therefore protect you from future infection.