Another name for a tetanus shot is a Td booster.
The Td booster is a vaccine that protects against two diseases: tetanus and diphtheria. It's primarily used to maintain immunity in adults and adolescents who have already received the complete series of tetanus and diphtheria vaccines in childhood. While "tetanus shot" is a common term, it often refers specifically to this booster dose or, in some cases, the tetanus-diphtheria-pertussis (Tdap) vaccine. Tdap also includes protection against pertussis (whooping cough).
Therefore, when someone refers to a "tetanus shot" as a booster, they are often talking about the Td vaccine.
