I've been suffering wih the herpes virus for many years now and I found a change in climate (and country: UK to South America) as well as taking echinacea drops (20 drops, 3 times per day) and Biostrath syrup has helped me a tremendous amount! I used to get blisters at least once a month and now I get them around twice (if that) a year. I highly recommend a healthy diet and the above herbal remedies. They've worked wonders for me.