My dad was a Chiropractor. He did not allow me to have vaccines growing up and I have not had any as an adult. When an invader such as virus or bacteria enter the blood the T cells start fighting immediately. Symptoms from the fight include fever, headaches, sore throats etc. After about two weeks the T cells communicate to the B cells that start making the anti-bodies and the body starts to get better. With vaccines the mercury, fermaldhyde, etc cause the B cells to immediately to start making anti-bodies. This sounds good but without communication from the T cells the antibodies aren’t based upon the virus but more on the poisonous agent with vaccine The result can be autoimmune diseases where the anti-body fights the body itself. I imagine those big pharma companies win.