Although some modern wizards speculate that mutations on the CCR5 gene may have provided resistance to the black death (and HIV-1), it's equally likely that vinegar packed with herbs and garlic is just as effective. Traditionally, you add four different herbs; one for each thief. If you're feeling particularly whimsical, go with parsley, sage, rosemary, and thyme. I substituted basil and majoram for the parsley and thyme, but that's just what I had on hand. Besides the huge quantity of crushed garlic will most likely overwhelm any individual herbal nuances as they marinate in an acid bath of vinegar.
The vinegar itself is raw apple cider vinegar (complete with mother), along with some sweeter moscato vinegar to take the edge off. And while my odds of contracting buboes may have not have changed, I have been loving this garlicky vinegar on potato salad, beans, and lots and lots of spring greens that have been shooting up from the garden.