I wonder about trying benadryl (diphenhydramine) and lactoferrin ( in milk and yoghurt.) These work together to help the body scrub the spike protein, but the benadryl might also help damp down the immune response.

Off the top of my head, other things to try might be vitamin D in a reasonably high dose because it moderates immune response, and possibly as a long shot, oral sodium bicarbonate, also for moderating immune response.

These things could be tried in addition to the detoxes other people have mentioned.