[header] How to tell if you have a cold sore [title] Understand that hsv-1 infections are common. [step] Up to 60% of americans have hsvi-1 by adolescence, and 85% by the time they reached their 60s. In britain about seven in 10 people have it, but only one in five are aware of it. 
This is because some people carry the infection, but don't have any symptoms. [title] Recognize the symptoms of the first outbreak.