Direct Current application cuts lesion duration down to 3% of what it was previously. (see United States Patent 5,133,352) Also some people report it completely eliminating herpes. I was lucky not to get mouth herpes till last year. Right when the first sores appeared I applied DC for 15 minutes twice daily for two days and the sores went away and never came back. I used the Herpes Zapper by BioElectric.