Sarracenia purpurea is a plant (possible herbal therapeutic) that is attracting some attention in light of the DS's smallpox threat. It can't hurt to have a few of these growing in your garden.
There are concentrated forms of it available as well:
https://www.indianayurvedicproducts.com/sbl-sarracenia-purpurea-1000-ch_2549.html
Also, tincture of iodine would be worth a try if this shit starts circulating:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5168213/?page=1