Fig. 4

Relative contribution of oral herpes versus genital herpes to HSV-1 incidence in the US. a, b Contribution of orally acquired versus genitally acquired HSV-1 among new (incident) infections in the total population of all ages. c, d Contribution of orally acquired versus genitally acquired HSV-1 among new infections in those aged 15–29, 30–49, and > 60 years. Of note is that the different panels have different y-axis scales