Manuka Honey – one of nature’s best antimicrobial sources, it received even more attention because of its antibacterial properties as well. Clinical studies showed that Manuka honey can inhibit multiple drug-resistant pathogens and has a broad spectrum of antibacterial capabilities.

Garlic – the chemical compounds in garlic have been proven to display antimicrobial activities that help kill pathogens responsible for common and rare infections. Garlic has been used for centuries to combat infectious diseases.

Oregano oil – one of the most powerful antibacterial essential oils, oregano contains antibacterial and antifungal compounds that make it effective against many strains of bacteria, including Escherichia coli (E. coli).

https://herbs.news/2021-08-02-medicinal-plants-what-you-need-to-know-about-herbal-antibiotics.html

If you grow oregano, you can make your own oil. Just remove about 1/2 cups leaves from your plant, chop them very fine, put in a small mason jar with a tight lid and cover with olive oil, or grape oil. Sit the jar in hot pan of water about half way up the jar (don't let water get into the jar) and let in boil for about 10 mins. Sit the jar in a dark place for about 2 weeks and shake it once a day (don't remove the lid until the 2 weeks are up. At the end of two weeks, strain the leaves from the oil and you have your own oregano oil. I keep mine in the fridge but you don't have to. You don't want to take more than 2 ts a day and your need to dilute with other oil 1/1 if you take it internally because it's very strong and will burn all the way down.