The Tetanus and Diphtheria Immunity Titer Test is a blood test that measures your antibody levels to determine whether you are protected against tetanus and diphtheria. These antibodies develop after vaccination and help your immune system recognize and defend against future exposure. Tetanus, often called lockjaw, is caused by bacteria that enter the body through cuts, wounds, or punctures in the skin. Once inside, the bacteria produce toxins that affect the nervous system, leading to painful muscle stiffness and spasms that can become life threatening if untreated. Even minor injuries can pose a risk if immunity has weakened. Diphtheria is a contagious bacterial infection that primarily affects the nose and throat. It spreads through respiratory droplets from coughing or sneezing. In severe cases, diphtheria can create a thick coating in the throat that interferes with breathing and may cause serious complications. Immunity to tetanus and diphtheria is highly effective after vaccination, but protection can decrease over time. This test confirms whether your antibody levels remain protective or whether a booster may be recommended to maintain immunity. What Is Included In This Test? This test measures: Tetanus IgG antibody levelsDiphtheria IgG antibody levels Results indicate whether your immune system has protective antibody levels from prior vaccination. Why Does This Test Matter? Tetanus and diphtheria are serious infections that can cause severe complications, including breathing difficulties, nerve damage, and in some cases death. While vaccination has made these diseases rare, exposure remains possible. Because immunity can decrease over time, especially if boosters are delayed, confirming your protection is important for long term health and safety. Many schools, employers, healthcare facilities, and travel programs require documented proof of immunity. This test provides clear laboratory confirmation of your immune status. Knowing your antibody levels helps you take proactive steps to stay protected and avoid preventable illness. Who Should Consider This Test? You should consider this test if you: Are unsure of your tetanus or diphtheria vaccination historyNeed documented proof of immunity for work, school, or travelWork in healthcare, emergency response, or childcareHave experienced a wound and are unsure of your immune statusHave not received a booster in the past ten yearsWant confirmation that your previous vaccination is still protective Convenient, No-Appointment Testing To complete your test: Order online through our website Use the lab locator to find a nearby testing location Walk in; no appointment required Access your results securely in your HealthLabs.com account within one to three business days 110% Price Guarantee! If you find the same test for a lower price from a comparable provider, contact us. We not only match the price, we beat it by an additional 10 percent of the difference.