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The shedding of herpes simplex virus Type 1 (HSV‐1) into saliva was studied in 110 healthy individuals, 55 patients who were undergoing oral surgery, and 21 immunocompromised patients in an asymptomatic Japanese population. Specimens were collected regularly for up to 2 months from each individual. Virus was recovered on at least one occasion from 4.5% of the healthy individuals, 20% of the patients undergoing oral surgery and 38% of the immunocompromised patients. In those individuals that shed virus, the duration of shedding varied from a mean of 1.2 days in the healthy individuals to 5.8 days in patients undergoing oral surgery, and was 3 days in the immunocompromised patients. The majority of oral surgery patients shed HSV‐1 into saliva within 7 days after surgery and immunocompromised patients shed virus almost continuously. The role of surgery in triggering the reactivation of latent HSV‐1, and the differences in rates of viral shedding between Americans and Japanese are discussed.

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