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Blood Titer


A titer is a measurement of the amount or concentration of a substance in a solution. It usually refers to the amount of medicine or antibodies found in a patient’s blood.


Blood titer measurements can be very helpful in determining medical treatment. Antibody titers can†tell the doctor if the patient has immunity to diseases such as measles, mumps, rubella, small pox, and hepatitis. Medication titers can tell if a person is receiving too much medication.

  • If born on or after January 1, 1957, provide proof of two immunizations for measles at least one month apart or immunity via a blood titer. (Persons born before this date are considered immune to measles)
  • Provide proof of one immunization for rubella or immunity via a blood titer
  • Provide proof of one immunization for mumps or immunity via a blood titer

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University of Illinois Springfield
One University Plaza
Springfield, Illinois 62703-5407



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