title: There is modest evidence that systemic acyclovir or valacyclovir prevents recurrent herpes labialis.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Massachusetts General Hospital and the Harvard University School of Dental Medicine, Boston, Massachusetts, USA. sungkiangchuang@gmail.com
authors.forename: Sung-Kiang
authors.initials: SK
authors.lastname: Chuang