A lot on this site are interested how a special interest manifests itself, I'm currently at the beginning stages of one now anyone following me on this site know I have been interested in Covid and how it maty relate to the immune system. this morning I got on my stationary bike for my morning bike ride just started reading a back issue of scientific American, this issue just happens to be about immunity many articles. One of my close friends, female, husband passed a few weeks ago, found out a year ago that she has graves' disease autoimmune disease the article I just started reading started with a case study on a woman who just found out she was being diagnosed with graves from the doctor's perspective. on top of that my son for Christmas gave me a book called Immune. basically, you do not look for special interests, they tend to find you. I care about my friend, want to help her in any way I can This is a real-life puzzle which tends to attract my mind.