Reviewed by Debra Jaliman on June 12, 2018

Sources

Mayo Clinic: "Cold sore." kidshealth.org: "Cold Sores (HSV-1)." World Health Organization: "Globally, an estimated two-thirds of the population under 50 are infected with herpes simplex virus type 1." Johns Hopkins: "Mouth Infections." NHS Choices: "Cold sore (herpes simplex virus) - Treatment."

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