Thanks for your query Here's some information about tetanus. A childhood immunization schedule of five doses is recommended. The primary series of three doses of DTP (DTwP or DTaP) should be given in infancy (2 months to 1 year) , with a booster dose of a tetanus toxoid containing vaccine ideally at age 4–7 years and another booster in adolescence, e.g. at age 12–15 years. Those who have received the primary series plus two booster doses, the last of which given in early adulthood, are unlikely to require further doses. All travellers should be up to date with the vaccine before departure. The type of tetanus prophylaxis that is required following injury depends on the nature of the lesion and the history of previous immunizations. However, no booster is needed if the last dose of the primary series, or of subsequent booster injections, was given less than 5 years ago for dirty wounds or less than 10 years ago for clean wounds.

Tetanus vaccine is once in 10 years. She has to take her next shot at 20 years, but if she get any deep injury then she has to take vaccine immediately. Hope she got HPV (cervical cancer) vaccine.