Immunity is defined as the ability of an organism to resist a particular infection or toxin by the action of specific antibodies or sensitized white blood cells.

There are 4 basic types of immunity:

    • Innate immunity. We are all born with some level of immunity to invaders.
    • Adaptive (acquired) immunity. This protection from pathogens develops as we go through life.
    • Passive immunity. This type of immunity is “borrowed” from another source, but it does not last indefinitely.
    • Immunizations (vaccinations)

Our immune system is essential for our survival. Without an immune system, our bodies would be open to attack from bacteria, viruses, parasites, and more. It is our immune system that keeps us healthy as we drift through a sea of pathogens.

Natural versus vaccine immunity by Dr. John Williams (Oct 2, 2021; 22 min)

    • Post infection natural immunity, debate and implications for mandatory vaccination
    • Circulating antibody titers were not predictive of T cell memory