The latest antenatal survey also showed that the rate of herpes infections rose as women got older. While less than a third of women younger than 20 years old were infected with the virus, about two-thirds of women between 25- and 29-years-old were infected.

The latest antenatal survey also showed that the rate of herpes infections rose as women got older. While less than a third of women younger than 20 years old were infected with the virus, about two-thirds of women between 25- and 29-years-old were infected.