<human>: Is there a way I can prevent a cold sore from forming?
<bot>: Yes, there are ways to help prevent a cold sore. One of the most effective methods is to use an antiviral medication such as acyclovir or valacyclovir. You should also avoid touching your mouth and lips with unclean hands, and try to limit contact with people who may have the virus. Additionally, you can reduce the risk of developing a cold sore by regularly washing your hands and avoiding close contact with people who may be infected.