[T]here’s a significant difference between natural immunity and vaccination immunity. When children are born, they develop natural immunity to hundreds, thousands, millions, and even trillions of microorganisms that they breathe in, eat, and touch through their skin. Their immune systems at the lining of their airways, at the lining of their intestines, and on their skin are actively protecting their body from the outside world.
Those immune systems that are intricately and specifically located in the linings are very important to create memory and protection to the organisms that they continue to breathe, eat, and touch. That immune system response then has a domino effect on creating other memory and immune responses that give your body antibodies and protection. That’s a very important step for how the immune system matures in our children. From the linings, the immune system receives information, sends out signals to all other parts of the immune system, and creates an immune response, memory, and antibodies.
On the other hand, when you inject materials into your body, you are bypassing that crucial first step called the primary line of defense. With vaccination you are just creating an antibody. That does NOT impart long-term immunity because it does not create the kind of memory that occurs when you breathe it in, eat it, or are exposed through the skin, and then go through the course of the natural disease.
— Joseph Mercola, DO
Mercola J. Expert Pediatrician Exposes Vaccine Myths. Mercola.com Nov. 14, 2009.