How Vaccinations Work by Philip Incao, M.D.


In order to use vaccinations wisely, we need to understand exactly how they work. Until recently, the mechanism of action of vaccinations was always understood to be simply that they cause an increase in antibody levels (titers) against a specific disease antigen (bacterium or virus), thus preventing infection with that bacterial or viral antigen. In recent years science has learned that the human immune system is much more complicated than we thought. It is composed of two functional branches or compartments that may work together in a mutually cooperative way or in a mutually antagonistic way depending on the health of the individual.


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