A person injured in a road accident requiring an urgent immune response was brought to the doctor. The doctor immediately gave an ATS injection. What type of immunity was provided to the patient?

Passive immunity is a kind of immunity in which readymade antibodies (gamma globulins), obtained from human or animal serum, are injected into the human body to provoke an immediate immune response.
Road accidents are accompanied with broken skin and dirt which urges doctors to prescribe anti-tetanus injections. ATS stands for anti-tetanus serum, which is a form of artificially acquired passive immunity.