The Yellow Card (ICVP), Decoded

The yellow card is the International Certificate of Vaccination or Prophylaxis, a paper certificate whose model is fixed in Annex 6 of the WHO International Health Regulations (2005), binding on 196 States Parties. It is valid for life from 10 days after the yellow fever dose, and yellow fever is the only disease a border may require it for.

Annex 7 of the same regulations designates yellow fever as the single disease for which "proof of vaccination or prophylaxis may be required for travellers as a condition of entry to a State Party." That is why the booklet exists and why a clinic printout is a different kind of object. The phone is for the family; the yellow card is for the border.

What is the International Certificate of Vaccination or Prophylaxis?

It is a standardized paper certificate issued by an authorized vaccination center to the person who received the vaccine, in a form no country may vary. Annex 6 is explicit that "no departure shall be made from the model of the certificate specified in this Annex," and that certificates "are valid only if the vaccine or prophylaxis used has been approved by WHO."

In practice, American families meet it exactly once: at an authorized yellow fever vaccination center, on the day of the shot. The CDC's ICVP page states that "yellow fever vaccination (travel) clinics administer yellow fever vaccine and issue ICVPs to vaccine recipients," and that blank certificates are sold to clinics through the Government Printing Office bookstore. You cannot buy one and fill it in yourself.

Whether your destination will ask for it at all is a separate question, answered in yellow fever entry rules.

What makes a yellow card valid, and what invalidates one?

Annex 6 sets both halves in a few sentences, and the invalidation rule is the most practical fact on this page.

• A signature, in the clinician's own hand. A non-digital certificate "must be signed by the clinician, who shall be a medical practitioner or other authorized health worker supervising the administration of the vaccine." The stamp does not stand in for it: the official stamp of the administering centre "shall not be an accepted substitute for the signature."
• The center's stamp as well. The CDC adds that the certificate "must be validated with the Uniform Stamp of the center where the vaccine was given."
• Complete, in English or French. Certificates "shall be fully completed in English or in French," and may add another language alongside.
• Untouched afterwards. "Any amendment of this certificate, or erasure, or failure to complete any part of it, may render it invalid." A corrected date in a different pen is a risk you take at a border.

Check the card before you leave the building. A blank line found in a departures hall cannot be fixed there.

How long is a yellow fever certificate valid?

For the life of the person vaccinated, beginning 10 days after the date of vaccination. The ten-year rule people remember was retired: the Sixty-seventh World Health Assembly adopted resolution WHA67.13 on 24 May 2014 to amend Annex 7, and WHO's note on the extension records that the amendment "enters into force and will be legally binding upon all IHR States Parties on 11 July 2016."

The same note settles the follow-up question. As of 11 July 2016, for both existing and new certificates, "revaccination or a booster dose of yellow fever vaccine cannot be required of international travellers as a condition of entry into a State Party, regardless of the date their international certificate of vaccination was initially issued." Lifetime validity applied automatically to cards already in circulation. An undamaged 2009 booklet is still a valid certificate.

The 10-day delay is not a formality either. A certificate issued eight days before departure is not yet valid on the day you land.

Where do you get one, and what should you check before you leave the clinic?

At an authorized yellow fever vaccination center, and the CDC's Yellow Fever Virus hub links the national directory of them. Most pediatric and primary-care offices are not on it.

Ask four questions before you sit down:

1. Will the certificate be issued at this visit, or on a later date?
2. What identification do you need in order to print the traveler's name on it?
3. How should the name be written so it matches the passport — hyphens, suffixes, a child's surname?
4. Who signs it, and will the Uniform Stamp be applied before we leave?

Then read the card in the parking lot, not in a terminal. Blank fields, a missing signature and a misspelled surname are all repairable on the day and expensive later.

Why is a phone photo for you and not for the officer?

Because the officer's rule names a document, not an image of one. Photograph the completed pages after the visit; that photo is a backup if a bag is stolen and a convenient way to copy dates into the household file later. It is not what goes under the glass.

What does not replace a completed certificate:

• A photo of a child's U.S. shot card
• A screenshot of an after-visit summary
• A state immunization registry printout
• A pharmacy sticker or a remembered date

Those belong to the family record, which answers a different question — see what officers accept as proof for that side. The household file is also the thing you actually reuse, at new clinics and on school forms, which is why getting your records out of an app matters more than it sounds.

Vaxnext holds no certificate and issues none; it keeps your family's vaccination dates on the phone, offline and without an account. The app is free, its ads are non-personalized, and vaccine records are never sent to an ad network. The yellow card stays in the passport pouch, where the border will look for it.

This article describes the certificate, not who should be vaccinated, and it is not medical advice: a clinician decides whether yellow fever vaccine is appropriate for a given traveler.

FAQ

Does one parent's yellow card cover a child?

No. Annex 6 of the International Health Regulations is unambiguous: "Certificates are individual and shall in no circumstances be used collectively. Separate certificates shall be issued for children." Each vaccinated traveler needs their own booklet in their own name. For a child too young to write, the same annex says a parent or guardian signs the certificate on their behalf.

Can other vaccines be written in the same booklet?

Clinics sometimes record other travel vaccines in the spare pages, and families find that convenient. It changes nothing legally: yellow fever is the only disease Annex 7 designates for entry requirements, so a hepatitis A line written in a yellow card is a note, not proof of anything a border asks about. Keep the full U.S. immunization history in your own record.

Is a clinic printout ever accepted instead?

Not where an International Certificate of Vaccination or Prophylaxis is required. The requirement names the model certificate in Annex 6, signed by the supervising clinician and validated with the center's Uniform Stamp. A printout, a portal page or a photo may satisfy a clinic abroad or a school at home, and is worth carrying, but it is not the document an entry rule points to.