There are two main ways to determine your disease immunity:
First, check your vaccine history.
Michigan healthcare professionals use the Michigan Care Improvement Registry (MCIR) to track the immunizations given to Michiganders throughout life.All Michigan residents are able to request a copy of their immunization record from MCIR through your physician, local health department, mail or fax.
In limited instances, another option may be to get a titer test.
A titer test is a laboratory blood test that checks for the presence of certain antibodies. It is used to see if someone is immune to a certain virus or needs vaccination. There are limitations of titers/blood tests in determining levels of immunity. While a titer test can check for antibodies, the presence of antibodies does not equal immunity. Because many vaccines protect against many different strains of disease, a titer test may not accurately show that you are protected against all the strains contained in the vaccine.
The CDC does not recommend titer testing for proving immunity due to the accuracy of the results. In Michigan, titer test results can only be accepted for supporting immunity for certain diseases, including Hepatitis A, diphtheria, tetanus, measles, mumps and rubella. These results may be dependent on additional immunity components such as exposure history.
Vaccination is still the surest way to build immunity. Your physician will determine whether or not a titer test is recommended.