: a herpesvirus (Simplexvirus humanalpha1) that is mostly spread by oral contact and causes the type of herpes simplex typically involving the lips, mouth, and face
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“HSV-1.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/HSV-1. Accessed 19 Nov. 2025.
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