well I just don't really think of it as "drinking" since we are talking about drops. You mix it with other stuff or put it in capsules, right? So as compared to taking gulps of tea, I don't really think of oregano oil as drinkable, just b/c you don't take enough of it at one time.
I'm not sure that I've ever actually had a flu, anyway. Maybe some mild ones I couldn't distinguish from a bad cold. Sometimes I kinda wish I would get sick enough just so I could stay at home and rest but too bad.