Guide · College students

College vaccine questions students actually ask.

Reviewed August 2026 · Based on the CDC/ACIP adolescent and adult immunization schedules¹, the American College Health Association's immunization survey², and NCSL's state-by-state college requirements tracker³. Educational reference — your specific college's requirements apply.

Most incoming college students have the same questions: why so much fuss about meningococcal? What's the difference between MenACWY and MenB? Do I really need Hep B if I'm majoring in English? Here are the answers, source-cited, so the health services form makes sense before you fill it out.

"Why do college dorms specifically require the meningococcal vaccine?"

Meningococcal disease — caused by the bacterium Neisseria meningitidis — spreads through close respiratory contact, and first-year students living in dormitories are documented to have several times the baseline risk of invasive meningococcal disease compared to non-college-age adults⁴. The disease is rare but devastating: rapid onset, high fatality rate, and survivors often have permanent complications (loss of limbs, hearing, cognitive function).

The CDC and ACIP specifically recommend a MenACWY dose on or after age 16 for first-year college students living in residential housing¹. About 26 states plus DC mandate MenACWY vaccination for college entry³, and most colleges in the remaining states require it as institutional policy.

"MenACWY, MenB — do I need both?"

Different vaccines, different bugs, different rules:

• MenACWY — protects against serogroups A, C, W, and Y of Neisseria meningitidis. This is the "routine" adolescent meningococcal vaccine. Required by about 26 states for college entry.
• MenB — protects against serogroup B, which causes a separate subset of meningococcal outbreaks. Recommended for ages 16-23 based on shared clinical decision-making — meaning the pediatrician discusses it with the family rather than universally recommending it. Only about 2 states specifically require it for college entry³, but individual colleges may require it institutionally.

Practically: your college's health services form will list which one(s) they require. If only MenACWY is listed, that's what you need. If both, get both — they're given as separate injections and can be administered at the same visit (different anatomic sites).

"I got MenACWY at 12. Do I need another one?"

Most likely yes. Per ACIP¹:

"Routine adolescent schedule: 2-dose series at age 11-12 years and 16 years."

The dose at 11-12 confers immunity but that protection wanes by late adolescence. A booster dose on or after age 16 restores protection through the highest-risk years (17-21). Most colleges specifically require documentation of a dose given on or after age 16 — if your only dose was at 12, you'll need a booster.

Catch-up rules from the ACIP notes:

• Ages 13-15 with no prior dose: 1 dose now, then a booster at age 16-18 (at least 8 weeks after the first).
• Ages 16-18 with no prior dose: 1 dose. If given on or after age 16, no booster needed — this dose satisfies most college requirements.

"Do I need Hep B if I'm not a science major?"

Yes, in almost all cases. Hepatitis B has been a routine childhood 3-dose series since the 1990s, and most colleges require documentation of a completed childhood series regardless of major. Two things to know:

1. Non-clinical majors generally only need documentation of the vaccine series itself — the shot record is enough.
2. Clinical programs (nursing, dental hygiene, phlebotomy, med school pre-req work) additionally require a post-vaccination anti-HBs titer confirming the vaccine took (≥10 mIU/mL). If you know you got the series but never had the confirmatory titer, order it before your clinical rotations start.

See our guides on timing your Hep B titer correctly and healthcare worker vaccine requirements for the specifics.

"My records are missing — do I have to start over?"

Almost never. Options in order:

1. Your state's Immunization Information System (IIS). Most doses given in the U.S. are automatically recorded there. See the state records directory for direct links.
2. Your high school records. Most high schools keep immunization records for at least 5 years post-graduation. Call the registrar or health services office.
3. Your childhood pediatrician. Even if you haven't been seen there in years, they keep records for 7+ years in most states.
4. Titers. A blood test can document existing immunity from prior vaccination — usually faster than tracking down old paper records. Effective for MMR, varicella, hepatitis A, and hepatitis B.

"Can I get an exemption?"

Yes, but rules are typically stricter at the college level than K-12:

• Medical exemption — universally accepted with physician documentation of a specific contraindication.
• Religious exemption — accepted at most public colleges (with variable strictness) and most private colleges except those with health-science programs; some states prohibit religious exemptions for higher education entirely.
• Personal-belief exemption — much less common at colleges than K-12; only a handful of states allow it at the higher education level.

During meningococcal outbreaks, colleges routinely exclude exempted students from campus until the outbreak is contained. This isn't punitive — it's standard public-health precaution allowed under state law and the college's health-services authority.

"When do I actually need to get all this done?"

Most colleges have a hard deadline before the semester starts — typically August 1 for fall enrollment. Missing the deadline can trigger a hold on class registration, dorm assignment, or ID card issuance.

Practical timeline for an incoming freshman:

• March–April: Check the college's health services website for exact requirements. Order your state IIS records to see what's already documented.
• May–June: Get any missing vaccines from your pediatrician or a pharmacy. If Hep B or MMR series is incomplete, start now — series completion takes several months.
• June–July: If titers are needed (for missing records or clinical program), order them. Allow 1-2 weeks for results.
• Early August: Submit everything to student health services. Follow up if you don't get confirmation within a week.

"My titer came back negative but I know I got the vaccine. What now?"

Common for MMR and varicella — the CDC explicitly acknowledges that commercial titer assays "often lack sensitivity to detect vaccine-induced immunity"⁵. Your options:

1. Get one additional dose of the vaccine. For MMR and varicella, one booster dose usually is enough — no need to repeat the whole series.
2. Re-titer 4+ weeks after the booster. This confirms the response and gets you the documented positive titer the college needs.

For Hep B specifically, a negative titer after a documented complete series usually triggers a repeat 3-dose series and a second titer. This is why timing matters — see the titer timing guide to avoid this trap.

Sources

1. CDC — Adult Immunization Schedule by Age, plus Child and Adolescent Notes. Source for MenACWY routine schedule and MenB shared clinical decision-making.
2. American College Health Association — Immunization Practices in College Health. Source for common college vaccine requirements survey data.
3. NCSL — State Vaccine Requirements for College Entry. State-by-state list of college vaccine mandates.
4. Meningococcal Disease and Vaccination in College Students (PMC). Peer-reviewed source for the dormitory-related risk factor evidence.
5. CDC — Immunization of Health-Care Personnel (MMWR RR-7). Source for the "commercial assays often lack sensitivity to detect vaccine-induced immunity" caveat.