Basically, a distinction is made between the innate and acquired immune systems. The innate immune system is the “all-rounder”; it fights all kinds of pollutants and harmful germs with immune cells, e.g. with
"Killer cells". However, if a specific pathogen appears that we have had contact with before, the acquired immune system intervenes. Its weapons are antibodies tailored to this specific pathogen.
When does our immune system stop learning?
Never. It learns throughout life! Because the specific defense system is constantly adapting, the body can also fight pathogens that change over time. Conversely, however, overreactions can also occur, e.g. allergies.
Kindergarten and school are very important as training for the immune system. With every infection that is overcome, memory cells are formed that allow the immune system to react more quickly during the second attack.
