CNN CNN Newsroom December 31, 2013 14:46:00
How the schools are trying to tackle it. [ female announcer ] right when you feel a cold sore, 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.