We actually don't/can't know all that the body/spirit/soul knows. In the mystery is the blessing of possibility. The endless possibilities of your body which could be rallying, not collapsing.
Your groundedness to yourself through yourself in connection with God/Source/Universe and everything is key to opening to the possibilities of this groundlessness.....but of course you already have that knowledge and the wisdom to live and be it. May you manifest health and ever expanding gratitude for all blessings.
I am praying for this "blessing in disguise" in that your immune system becomes more activated. Groundlessness holds surprising opportunities for life to move in positive directions.