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My sister had warts as a child, and my gran did the burying a piece of meat in the back garden routine - with the proviso that the person with the wart must not know where the meat is buried. My sister also had a problem with chewing her fingernails at the time, and she painted her wart with the anti-chewing liquid.
I don't remember which method worked.

Do viruses get killed off by anything with antibacterial properties?

If so, I would suggest bamboo, silver or salt water.

For new piercings I always use warm salt water soaks, this also helps deal with acne, and I even beat off a huge impetigo infection by soaking in warm salt water as often as I could. So that may well be a cure-all?

Theoretically, no. Viruses aren't affected by antibiotics either - but the one wart I've ever had disappeared after a penicillin injection. Maybe the virises haven't read the script.

My son had a horrible case of plantars warts on his feet. We did all the chemical things, even had them frozen and they still came back.

We used the inside of the banana peel bandaged on his feet over night, every night for about 2 weeks. They were gone and never came back. These things were like mountains they were so big!

Good luck!

does banana peel work for verrucas?

Isn't a verruca the same as a wart. I would think so, but I'm no doctor. I just play one on the internet