how long is a td vaccination good for
1 Td is a tetanus and diphtheria vaccine given to preteens, teens, and adults as a booster shot every 10 years, or after an exposure to tetanus under some circumstances.  Tdap is similar to Td, but also contains protection against pertussis. Tdap should be given as a one-time booster in place of Td.
Answers From Experts & Organizations (1) SUCCESS! A. You need to get another tetanus shot.... Yes, the vaccine lasts ten years, but not to the day or month. To be safe, get another one and you will be good for ten more years. The vaccine is 100% effective, and tetanus (the disease) is just about 100% fatal, so it pays to be safe.