★★★★★
In 1973 after the birth of my second son, I had a boil which I lanced and got blood poisoning from. I had a course of anti-biotics which didn't help, I then got another boil, not long after. I took 'staal druppels' I cannot remember how many drops at a time, only for a couple of days, I have not had a re-occurence of boils since then.
EC: Staal druppels (translates to "steel drops") is a liquid that bonds open wounds. Does not appear to be sold in the USA.