You need a tetanus shot every 10 years to maintain protection against tetanus. After completing the initial series of three tetanus shots (given over several months), booster shots are recommended every 10 years for adults

. Key points about the tetanus vaccination schedule:

• Initial series for adults never vaccinated: Three doses - the first two at least four weeks apart, and the third dose 6 to 12 months after the second

• Children: Receive a 5-dose DTaP series starting at 2 months of age, with boosters through early childhood

• Adolescents: One dose of Tdap at 11 to 12 years old

• Adults: After the initial Tdap dose, receive Td or Tdap boosters every 10 years

• Special cases: If you have a deep or contaminated wound and it's been more than 5 years since your last tetanus booster, you may need a booster sooner

While some research suggests tetanus boosters might be needed less frequently than every 10 years, the CDC and most health authorities currently recommend the 10-year interval as standard practice

. In summary, for ongoing protection, adults should get a tetanus booster shot every 10 years.