International Students: Titers and TB Testing for U.S. Schools
Short answer: If your school can't accept your vaccine records from home, because they're in another language, missing dates, or simply not on file, a titer blood test can show your immunity directly. For TB screening, most international students who had the BCG vaccine as children are better served by the TB blood test (QuantiFERON) than the skin test. Many students cover everything with one order and one lab visit after they arrive in the U.S.
Quick answer
U.S. colleges and health programs usually ask every new student for proof of immunity to measles, mumps, and rubella (MMR), and often varicella (chickenpox) and hepatitis B, plus a TB screening. Records from another country are often accepted, but only if the school can read and verify them. When they can't, a titer is the standard alternative: a blood test that measures the antibodies already in your body. It documents immunity whether you were vaccinated in Mumbai, Lagos, Manila, or Mexico City.
Step 1: Check whether your home-country records will work
Before you pay for any test, see if your existing records meet your school's rules. Schools commonly ask that records:
- Are in English, or come with an English translation (some schools ask for a certified translation)
- Show your full legal name (in the Latin alphabet) and date of birth
- List the vaccine name and the full date of each dose (month, day, and year)
- Carry a stamp, signature, or letterhead from the clinic or provider who gave the vaccine
If your records meet these rules, you may not need titers at all. If dates are missing, the names don't match, or the school can't interpret the document, it may ask you to repeat vaccines or provide titers instead. This is why many international students go straight to titers.
Step 2: Know which requirements a titer can and can't cover
| Requirement | Can a titer prove it? | What to order |
|---|---|---|
| Measles, mumps, rubella (MMR) | Yes, with a positive IgG result for each | MMR Titer ($79) |
| Varicella (chickenpox) | Yes | Varicella Titer ($46.99) |
| Hepatitis B | Yes (quantitative surface antibody) | Hep B Titer ($38.88) |
| TB screening | Not a titer. TB needs its own test (blood test or skin test) | TB Blood Test (QuantiFERON) ($137) |
| Tdap, meningococcal (MenACWY), and others | Usually no. Schools normally want a vaccine record or a new dose | Ask campus health or a clinic about the vaccine |
Need several of these? The Immunity Panel + TB Blood Test ($268) covers Hep B, MMR, varicella, and QuantiFERON in one order and one blood draw. If you don't need TB, the Immunity Panel: Hep B + MMR + Varicella is $136.
Step 3: Choose the right TB test if you had the BCG vaccine
BCG is a TB vaccine given to babies in many countries outside the U.S. It matters for school paperwork because BCG can cause a false-positive TB skin test, sometimes many years later. The CDC says TB blood tests (IGRAs, such as QuantiFERON) are the preferred test for people who received BCG, because the blood test is not affected by it.
- TB blood test (QuantiFERON): one visit, read by a lab, not affected by BCG
- TB skin test (PPD): two visits (placement, then a reading 48–72 hours later), and a BCG history can lead to a positive reading and extra follow-up
Some schools specifically ask for QuantiFERON or T-SPOT for international students. If your form names a specific test, order that one. If the form allows either, and you had BCG, the blood test is usually the simpler path.
If any TB test comes back positive, the usual next step is a chest X-ray and a medical evaluation. A positive result most often means a dormant (latent) infection that is not contagious, and it does not usually end your enrollment. See what to do after a positive TB test.
Step 4: Plan your timing
- Testing happens in the U.S. Blood draws are done at national lab partner patient service centers in the United States, so most international students order after they arrive. Leave yourself time before your school's deadline.
- Typical result times for most people: MMR, varicella, and hepatitis B titers usually within 24–48 hours, and the TB blood test (QuantiFERON) usually within 1–4 days. These are typical times, not guarantees, so don't wait until the week your registration hold starts.
- Getting vaccines too? Live vaccines such as MMR and varicella can affect TB test results. Do your TB test before or on the same day as a live vaccine, or wait about 4 weeks after. See titer and TB timing after a vaccine.
- Some schools set a recency window for TB tests, for example within a few months of your start date. Check your form before you test.
Step 5: If a titer comes back negative
A negative or equivocal (borderline) titer is common and is not a reason to panic. It usually means your school will ask you to get the vaccine (or a booster) and, for some programs, repeat the titer a few weeks later. Your campus health center, a pharmacy, or a local clinic can usually give the vaccine. Follow your school's instructions for what to upload and when.
What your lab report will show
Your results come as an official lab report you can download and upload to your student health portal. It includes your name, date of birth, collection date, test names, results, and reference ranges, which are the details most schools look for. See a sample titer result and what should be on a titer lab report for school.
Recommended SchoolTiters links
- Immunity Panel + TB Blood Test: Hep B, MMR, varicella, and QuantiFERON in one order ($268)
- Immunity Panel: Hep B + MMR + Varicella ($136)
- TB Blood Test (QuantiFERON) ($137)
- MMR Titer ($79), Varicella Titer ($46.99), Hep B Titer ($38.88)
- What if I lost my vaccine records?
Need help with your school's form?
For tests ordered through SchoolTiters, we can help complete eligible sections of your school's immunization form once your results are back. Fill in your personal information and email the form to customerservice@labreqs.com.
FAQ
Will my U.S. school accept vaccine records from my home country?
Often, yes, if the records are in English (or translated), show your full name and date of birth, list each vaccine with a complete date, and carry a provider stamp or signature. If the school can't verify them, it may ask for titers or repeat vaccines instead. Check your school's health requirements page.
I had the BCG vaccine. Which TB test should I get?
The CDC prefers a TB blood test (IGRA, such as QuantiFERON) for people who received BCG, because BCG can cause a false-positive skin test. If your school's form allows a blood test, it is usually the simpler choice.
Can a titer replace all of my vaccine records?
Not all of them. Titers are commonly accepted for measles, mumps, rubella, varicella, and hepatitis B. TB screening needs its own test, and requirements like Tdap or meningococcal usually need a vaccine record or a new dose.
Can I do the blood draw before I arrive in the U.S.?
SchoolTiters blood draws happen at national lab partner locations in the United States, so most international students test after arriving. If you test in another country, your school may require the results translated into English.
How long do results take?
For most people, MMR, varicella, and hepatitis B titer results are usually ready within 24–48 hours after the blood draw, and the TB blood test (QuantiFERON) usually within 1–4 days. These are typical times, not guarantees, so plan ahead of your school's deadline.
What happens if my titer is negative?
Your school will usually ask you to get the vaccine or a booster, and some programs ask for a repeat titer afterward. A negative result is common and does not usually affect your admission.
This page is a general resource for international students and is not medical advice. Immunization and TB requirements vary by school and program. Always confirm the exact requirements with your school's health or compliance office before ordering.
