CNN Sanjay Gupta MD January 5, 2014 12:54:00
Abreva can heal a cold sore in as few as 2 1/2 days when used at the first sign. without it, the virus spreads from cell to cell. unlike other treatments, abreva penetrates deep to block the virus, to protect healthy cells so cold sores heal fast. as fast as 2 1/2 days when used at the first sign. ♪ learn more at abreva.com. don't tough it out. knock it out! fast. [ female announcer ] only with abreva.