Ventilation-perfusion (V/Q) scan is a specialized test that uses a radioactive substance to show the parts of the lungs that are getting oxygen (ventilation scan) and getting blood flow (perfusion scan) to see if there are portions of the lungs with differences between ventilation and perfusion.
Moleskin may be the first commercial blister treatment and prevention product I remember using. My dad always kept some moleskin in his pack and at the first complaint of any hot or sore feet, out it would come.
The best ratio is up to 6 drops in 5 ml of carrier oil. Mix well and dab on the blister using a cotton-tip applicator. A blend of Ravensara essential oil and Tamanu oil is useful for another Herpes Virus namely Shingles. It may be helpful for use with cold sores too. Remember everyone's immune system is different and with Aromatherapy we can try different essential oils. What works for one person may not work for the next. With trial and error you can usually find one or a combination of a couple of essential oils that work best for you.