How Long Are Titers Good For? A Complete Guide

Short answer: it depends entirely on your program's policy, not on the biology of the titer. Most nursing, medical, dental, PA, and allied-health programs will accept a positive titer indefinitely, but a growing number require the test to have been drawn within a specific window — usually the last 3, 5, or 7 years. Here's how to figure out what applies to you before you spend money re-testing.

The short version. Immunity itself doesn't have a hard expiration date — a positive antibody titer generally means you're immune at the time of the test. But programs set their own rules for how recent the test result must be. Check your program's exact wording before you assume old records will count.

What "titer expiration" actually means

There are two different questions people are asking when they type "do titers expire" into Google, and they have different answers.

Question 1: Does my immunity go away?

Sometimes yes, sometimes no — depending on the disease. Measles and mumps immunity from vaccination tends to be highly durable. Hepatitis B surface antibody levels commonly wane over decades. Varicella immunity from natural infection is essentially lifelong. This is a clinical question best answered by re-testing when needed, not by assuming a specific "expiration."

Question 2: Will my program accept an old titer report?

This is the question most students are really asking, and the answer is: check your program's compliance page. Common policies you'll see:

  • "Positive titer accepted regardless of date" — some programs accept any positive quantitative titer as lifetime proof of immunity.
  • "Within the last 3 years" — common at community-college nursing programs and some allied-health programs.
  • "Within the last 5 years" — common at university-based programs.
  • "Within the last 7 years" — less common, sometimes seen at specific hospital-affiliated programs.
  • "Drawn as an adult" — some programs won't accept titers drawn during childhood, even if positive.
  • "Must be quantitative with numerical value" — qualitative "immune/non-immune" titers from decades ago may be rejected in favor of modern quantitative reports.

Where to find your program's specific policy

Three places to check, in order:

  1. Your program's health/compliance page. Search "[program name] immunization requirements" or "[program name] health clearance."
  2. Your compliance portal's documentation upload page. DISA Healthcare Technology (formerly CastleBranch), Complio, SurPath/SurScan, and similar portals often show the exact acceptance criteria when you try to upload a document.
  3. Your program coordinator. If the policy is ambiguous, an email to your program's administrative office gets a definitive answer.

What to do if your old titer might not count

If you have an existing positive titer that predates your program's acceptance window, you have three practical options:

  1. Submit it anyway and let the portal decide. If it's positive and quantitative, it may be accepted. If rejected, you'll know within days.
  2. Order a fresh titer. This is the cleanest path. A fresh quantitative titer replaces any ambiguity with a current, dated report.
  3. Skip the titer and get the booster/vaccine. If your original titer was for a disease where a booster is inexpensive and low-risk (e.g. Tdap, MMR), some students choose to re-vaccinate and provide vaccination records instead of re-testing.

Timing tip. A fresh titer report from us takes 48–72 hours to return. If your program has a documentation deadline coming up, ordering a fresh titer early is almost always the safer play than gambling on whether an older record will be accepted.

Common misconceptions

  • "My childhood vaccination card is enough." Sometimes yes, sometimes no. Many programs specifically require titer verification even when vaccination records exist, especially for MMR, Varicella, and Hep B.
  • "A positive titer means I'm immune forever." Biologically, usually yes for measles/mumps/rubella. Practically, your program may still require a recent test.
  • "Titers from my pediatrician are automatic." A positive quantitative titer is a positive quantitative titer — but only if the report is legible, typed (not handwritten), includes numerical values with a reference range, and comes from a CLIA-certified lab.

Ready to order a fresh titer?

Rather than gamble on old records, a fresh quantitative titer gives you a school-acceptable PDF in 48–72 hours. Browse our full titer catalog, or start with the most commonly required tests:

Or read the full Titer FAQ for more context on what each program typically requires.

A note on this guide. This is a general resource, not medical advice. Program requirements vary widely — always confirm the exact acceptance policy with your program's admissions office or compliance portal before making testing decisions.

Order Test
Verified Customer Reviews
>