Mistakes and myths
Seven travel health mistakes, and what they actually cost
These are not exotic failures. They are the same seven every year, and five of them cost money rather than health. All of them are avoidable in an afternoon.

In short
- Treating a GHIC as insurance leaves the repatriation gap wide open.
- Not declaring a pre-existing condition can invalidate the entire policy, not just that condition.
- Buying insurance the week before departure wastes months of cancellation cover.
- Assuming childhood vaccinations still cover you as an adult is usually wrong.
1. Treating the GHIC as insurance
The card gets you state healthcare on local terms in participating countries. It does not fly you home, does not cover a private clinic, and does not exist at all in most of the world. Repatriation is the specific gap: an air ambulance to the UK is the sort of cost that changes a family's finances, and only insurance pays it.
2. Not declaring a pre-existing condition
People leave out conditions that feel irrelevant, historic or embarrassing. Insurers treat non-disclosure as a policy-level failure, which means a refused claim can extend well beyond the undeclared condition. Declare everything you have received treatment, medication or investigation for, and if a specialist insurer is needed because the mainstream quote is unaffordable, use one — the premium is not the expensive part of this decision.
3. Buying insurance at the airport
Cancellation cover runs from the moment you buy the policy. Buying it the week before you fly means the months in which you might have fallen ill, broken a leg or had a bereavement were uninsured. Buy when you book.
4. Leaving vaccines too late
Multi-dose courses have minimum intervals; inactivated vaccines need roughly two weeks to take effect; and the yellow fever certificate is not valid until ten days after the dose. Booking four days before departure does not get you a compressed version of the same protection. It gets you a partial course and, for yellow fever, an entry problem.
5. Assuming childhood vaccinations still cover you
Tetanus, diphtheria and polio protection lapses over time, and measles coverage in adults is patchier than people assume. A travel appointment is the natural moment to check routine boosters, which are the cheapest and least glamorous part of the visit and also the part most likely to matter.
6. Packing medicines carelessly
Three separate errors sit here. Taking medicines out of their labelled packaging, which makes them hard to identify at a border. Putting everything in hold luggage, which fails the moment a bag is delayed. And not checking whether the destination restricts what you take — several common UK medicines, including some painkillers and stimulant medications, are controlled or prohibited elsewhere, occasionally with serious consequences. Check with the destination's embassy and allow time for any permit.
7. Assuming your GP handles all of it
Many GP practices do not provide travel vaccination services at all, and almost none stock yellow fever vaccine. Discovering this five weeks before departure is manageable; discovering it five days before is not. Ask early what your practice actually offers, then plan the rest around that answer. The order to do things in is in the twelve-week countdown.
The common thread
Six of these seven are timing errors wearing different costumes. Travel health admin is not difficult, it is just front-loaded: nearly everything that goes wrong could have been fixed by doing it six weeks earlier. That is the entire argument of this site.
Common questions
Is travel insurance worth it for a short European trip?
The GHIC covers state treatment in participating countries but not repatriation, private care or cancellation. Those risks do not scale down with trip length.
What if I develop a condition after buying the policy?
Tell the insurer. Most policies require you to notify changes in health, and failing to do so can affect a later claim.
Can I be refused boarding without a yellow fever certificate?
Yes, where the destination requires one. It is an entry condition, checked by airlines and border officials.
Do I need documentation for ordinary medication?
Original labelled packaging is the baseline. A printed list from your GP or pharmacist using generic names is sensible, and some countries require more.