For the record for those at Class on 3/1:
Oil of oregano does have antibacterial and antifungal properties. Research literature shows it is effective in eliminating E. Coli from chickens and mice. Nothing on humans that I could find.
However, high doses can cause stomach ulcers and dizziness. "Highs" from oregano are thought to derive from the effects on the stomach that causes shunting of blood away from the brain to the stomach. This leads to lower (altered) metabolism in the brain.
Finally, being planted-based anaphylactic, life-threatening allergy is also possible.
If you want to go natural for sore throats, I'd stick with teas, honey and zinc lozenges.
Dan