Immunization Records: How to Track, Retrieve, and Store Them

Start with what you already have. Search for a yellow CDC-issued vaccination card, a home health binder, a baby book, or any prior medical discharge paperwork. Check email archives for digital vaccination confirmations sent by pharmacies or clinics — many providers began emailing summaries during and after the COVID-19 pandemic. Even partial records narrow the scope of what you need to retrieve officially.

Your primary care physician, pediatrician, or the clinic where most of your care occurred likely retains vaccination records in their electronic health record (EHR) system. Call the office and request a copy of your immunization history. Be prepared to verify your identity and, if records are older, understand that some practices purge files after a certain retention period, which varies by state law.

Every U.S. state and territory maintains an Immunization Information System (IIS) — a confidential electronic database that consolidates vaccination records reported by participating providers. Visit your state health department's website and locate the IIS or immunization registry portal. Most allow adults to request their own records directly; some require submitting a form with proof of identity. The CDC's website maintains a directory of all state IIS contacts if you have difficulty locating your state's system.

Schools are required to collect and retain immunization records at enrollment, making them a useful secondary source — particularly for childhood vaccines. If you attended college, your campus health center may hold records as well. Employers in healthcare, childcare, or food service often retain occupational vaccination documentation. Veterans can request military immunization records through the National Archives or the milConnect portal maintained by the Defense Manpower Data Center.

If specific vaccination records cannot be found through any channel, a healthcare provider can order serologic titer tests for certain diseases. A titer test measures the level of antibodies in your blood, indicating whether previous vaccination or infection produced protective immunity. This approach is commonly used for measles, mumps, rubella, hepatitis B, and varicella. Your provider will advise whether re-vaccination or documentation of immunity is the appropriate next step — this is not a decision to make independently.

Once you have gathered all available records, compile them into a single organized file. Scan physical documents and save them to an encrypted digital location. Enter vaccination dates into a personal health record app if you use one. Keep the physical originals in a labeled folder stored with other important documents. Whenever you receive a future vaccine, add the documentation to your system immediately — ideally before leaving the appointment.