The goal of vaccines is to create immunity. The immune system identifies germs such as bacteria and viruses and removes them from the body.
A vaccine is a substance that primes the body's immune system to make antibodies (proteins that destroy disease germs). Once they have found a germ that should not be in the body they create ‘memory’ cells. These memory cells can live for a very long time, sometimes forever. Memory cells let the immune system recognize germs it has seen before, so if the germ ever enters the body again it can be destroyed before it has a chance to make you sick.
When you are vaccinated you build up your immune system, making you stronger and more resistant to disease.
Not all memory cells can live forever. This is why for some diseases; we need to have booster shots. Booster shots remind the immune system how to fight against the germs. That’s why it’s important to follow the immunization schedule - it gives the best protection with the fewest doses of each vaccine.
Vaccines are the best way to protect you and your family from against some very serious infections.