If you have nasopharynx inflammation, you will not necessarily know it, because it may not cause any local symptoms. And you cannot see the nasopharynx to check if it is inflamed, as it is just above the back of the throat (pharynx). The method to test for nasopharynx inflammation is to poke a long Q-tip into it, and if there is blood on the Q-Tip, then you have inflammation.
Four theories possibly explaining how autoimmune diseases arise.
They are: (a) molecular mimicry, (b) bystander theory, (c) polyclonal activation, and (d) a dysregulation in the function of T-cells.
Molecular mimicry might trigger autoimmune demyelination after Hepatitis B Vaccination.