Would any of these people be open to using Ivermectin?
Nice thought. One's dead. One has brain cancer, and IVM doesn't cross the blood brain barrier. My son's still mad at me for taking IVM instead of the vaxx, so probably won't suggest IVM to my daughter-in-law's mom.
That leaves the neighbor. We've told him about a number of other alternative options, but it can't hurt to tell him about IVM as well.