Immunity Detection & Titer Testing in Illinois

Immunity detection and titer testing is a blood test that checks whether you have antibodies against specific infections or vaccines. It helps determine if you are protected or need a booster, often for school, work, or travel requirements.

What it measures

Antibody levels (titers) — Measures the amount of antibodies against a specific disease, such as measles or hepatitis B.
Immune status (positive/negative) — Indicates whether you likely have protection based on a threshold set by the lab.
IgG antibodies — Shows past infection or vaccination, as these antibodies develop over time.
IgM antibodies — Suggests a recent or current infection, but is not always included.

Who it is for

This test is often ordered by employers, schools, or travel clinics to verify immunity. A healthcare provider may also order it if you are unsure about your vaccination history.

Preparation

No fasting is required. Tell your provider about any medications or conditions that affect your immune system.

Results and what they mean

Results are reported as positive or negative, or as a number with a reference range. A clinician interprets these results in the context of your health and vaccination history. This is general information, not medical advice.

Requesting the Immunity Detection & Titer Testing in Illinois

Order online, choose a certified collection site in Illinois, and review results through a secure portal. No referral is required, and orders are processed confidentially. With a wide spread of cities and towns where trips are often grouped together, it pays to schedule your collection in advance.

Frequently asked questions

Do I need to fast for this test?

No, fasting is not required. You can eat and drink normally before your blood draw.

What does a positive result mean?

A positive result usually means you have antibodies that suggest protection, but your provider will explain what it means for you.

Can I get this test without a doctor's order?

Some labs offer it directly, but a clinician should interpret the results and advise on any needed vaccines.

How long does it take to get results?

Results are typically available in 1 to 3 business days.

Immunity Detection & Titer Testing by city in Illinois

All testing in Illinois → Full Immunity Detection & Titer Testing guide →