An MMR Titer is a blood test that checks your antibody titer levels to Measles, Mumps and Rubella. It is run in a laboratory. A titer test is not an injection, shot, or vaccination. An antibody is a component of the immune system.
If you're an adult, get a Td (tetanus and diphtheria) booster shot every 10 years to stay protected. Since some people may lose the protective antibody levels after 5 years, a booster vaccination is recommended if you get a deep, contaminated wound and haven't had a vaccination in more than 5 years.
Your doctor may recommend that you have a tetanus-containing booster vaccination if you are 50 years or older and you have not had a tetanus booster vaccination in the previous 10 years, if you have been injured, or before travelling. Ask your doctor for advice. The tetanus vaccine can be given to pregnant women.