I’m with @Francisco and @MeganB on this. Science and belief should go hand in hand. Our magic is great at relieving fear, stress, emotional pain (but still see professionals for meds and therapy). Lessons we learn from nature may even protect us from disease. The best weapons we have from covid, though, are social distancing, masks, sick people staying home, avoiding crowded areas, and possibly people over 40 getting a booster of their MMR vaccine.
Like @john4 said, we’re not medical professionals so do your own research to be sure. Talk to your healthcare provider. Let them take science as far as our can go, all the while allowing belief to bring you peace.
I saw I quote once that I love,
Worry forgets the good things that hope remembers.
Remember your magical practices during covid, through your stress, and through the pain from your autoimmune. And trust the professionals. These things do not last forever. People have a funny way of getting themselves into dark places only to find out at also make great nightlights.