Cold sores are highly infectious blisters that develop on the lips and around the mouth. They result from a common viral infection and tend to be contagious for around 15 days. Learn more here.
Medical News Today: How long are cold sores contagious for?
Cold sores are highly infectious blisters that develop on the lips and around the mouth. They result from a common viral infection and tend to be contagious for around 15 days. Learn more here.