If there is a history of the mRNA injections, my BIL has been fighting a skin rash which the docs are throwing things at. I got him the "horse paste" via mail order -- it is a paste with ivermectin at 1.87 percent in a non-reactove carrier -- to apply externally. Used as a rub-on, it seems to be providing relief and some remission. Work in progress....
Good luck and best wishes.