TY - JOUR T1 - Prevalence of recurrent herpes labialis and aphthous ulcers among young adults on six continents JF - Canadian Medical Association Journal JO - CMAJ SP - 627 LP - 630 VL - 113 IS - 7 AU - J. A. Embil AU - R. G. Stephens AU - F. R. Manuel Y1 - 1975/10/04 UR - http://www.cmaj.ca/content/113/7/627.abstract N2 - The prevalence of recurrent herpes labialis (RHL) and recurrent aphthous ulcers (RAU) in young adults - - 635 armed-forces recruits and 9897 health-profession students - - in 48 institutions in 21 countries was determined by a questionnaire survey. Two or more occurrences (lifetime prevalence) of RHL were reported by 33.2% of men and 28.0% of women; the corresponding figures for RAU were 38.7% and 49.7%. North American respondents, mainly from Canada, had a significantly higher prevalence of both lesions. There were some differences in relation to profession. Approximately 15% of all the people surveyed had had herpes labialis and 25% had had aphthous ulcers at least once during the previous year. Persons with a history of recurrence of one lesion were more likely to have a history of recurrence of the other. ER -