Tetanus shots are available in the emergency departments of public hospitals and are generally recommended to be administered within 24 hours after injury. It is advised not to drink alcohol before the injection, as standard tetanus toxoids need a skin test, and alcohol consumption can cause generalized skin flushing, affecting the test results. Tetanus shots are especially recommended for wounds that are heavily contaminated with dirt, rust, are from open fractures, or are deep, creating an anaerobic environment, as the bacterium Clostridium tetani is anaerobic and can lead to severe infections once contracted.