Pure Turkey oregano oil is a very powerful bacterial/virial killer as well as circulation enhancer and lung influencing herb and much more. The Dr. Cass Ingram books are what you need, but ignore his crazy HUGE mark up, he was a MD and still wants to rip all his customers off, just read his info to learn many uses of oregano.
We add 3 drops to the bath water and use 1 full dropper in a pan of water with a fan over it every night and so much more! The Amish clinic stated several years ago that it can replace every herb and every drug if used correctly.
1 drop per day in a capsule is the easiest method. If you want it more for the lungs, you dillute it with olive oil and then take 1 drop in the lower front lip. In the bath it is form circulation and also for the lungs because you breath the fumes.