Most people spend more time researching airport lounges than their own immunization records. That imbalance has consequences.
The Diseases That Don’t Wait for You to Get There
Ebola outbreaks in Africa and a hantavirus case aboard a cruise ship make dramatic headlines, but the health risks that actually derail trips tend to be far more ordinary. Measles is the clearest example. The CDC has stated that measles cases are rising in many countries, and recommends that all international travelers be fully vaccinated with the measles-mumps-rubella (MMR) vaccine before departure. Yellow fever and rabies carry significant regional risks — yellow fever in parts of sub-Saharan Africa and South America, rabies wherever travelers are spending extended time outdoors or around animals — but measles is essentially a global exposure risk, not a regional one.
Then there are the infections people underestimate precisely because they’re so familiar. Covid and influenza circulate year-round in enclosed spaces, and an airplane cabin is about as enclosed as it gets. Neither vaccine guarantees full protection against every circulating strain, but both reduce the odds of spending the first three days of your trip horizontal in a hotel room. Tetanus and polio are easy to forget about because most people received them in childhood — but a booster may be warranted before travel, particularly to higher-risk destinations. The protection from those childhood vaccines isn’t necessarily permanent.
Childhood vaccines wear off on different schedules, and many travelers have no idea where they stand.
The structural problem is that most people don’t consult anyone about this. They check visa requirements, exchange rates, and weather forecasts. They do not pull up their vaccination history.
Why 90 Percent of Travelers Skip the One Step That Matters
Only 10% of travelers who should seek a travel health consultation actually do so, according to Corey McVey, director of nursing at Passport Health in Chicago and Wisconsin. That figure reflects a set of overlapping misconceptions, each plausible enough to feel like a reasonable excuse.
The most common one is simple optimism. McVey describes it directly: people believe they won’t get sick, that they won’t encounter illness or disease abroad. His counterargument is blunt. “You should get a consultation for the same reason you wear a seat belt. You don’t know about others. You don’t know about the people cooking your food.” Risk is not purely a function of your own behavior — it involves every surface, meal, and water source you encounter, and every person who handled any of them before you did.
A second misconception is that a visit to a primary care physician covers the same ground as a travel health consultation. It doesn’t, though it’s still worth doing. Primary care physicians may not carry the specific vaccines a traveler needs, and McVey notes that they aren’t always current on active outbreaks. Travel clinics track international health developments as a core function — it’s the difference between general medical knowledge and destination-specific intelligence. A GP appointment is a starting point, not a finish line.
The third misconception is that online research is sufficient. The CDC’s Travelers’ Health website is genuinely useful and should be the first place anyone looks — you can enter your destination country and get a breakdown of recommended vaccines, medications, health and safety tips, and medical packing lists. The WHO’s international travel and health resource is a solid secondary source. But no website knows your health history, your planned activities, or the specific conditions at your destination this week. McVey’s point is concrete: “The needs of a backpacker traveling through Thailand are different than a business traveler who will only be in Bangkok a few days.” A consultation applies general data to a specific person. Websites can’t do that.
The fourth misconception runs in the opposite direction — some travelers avoid vaccines because they believe the shot itself causes the disease. McVey encounters this regularly. Very few people experience significant side effects from travel vaccines, and the mechanism of a live attenuated vaccine is not the same as contracting an infection naturally. Fear of side effects keeps a meaningful number of people from protecting themselves against diseases with far worse outcomes.
How to Actually Use the CDC’s Travelers’ Health Site
The CDC’s Travelers’ Health site is the right first stop, and it’s worth knowing how to use it properly rather than just landing on the homepage and leaving. The destination search function returns a structured breakdown: vaccines listed as routine, recommended, or required; information on malaria risk and medication options; food and water precautions; and country-specific health notices. Required vaccines — yellow fever being the most common example — are not suggestions. Some countries will not allow entry without proof of vaccination, and some require a signed certificate from an authorized clinic, not just a doctor’s note.
Routine vaccines on the CDC list are the ones you should already have regardless of travel: MMR, tetanus-diphtheria-pertussis, varicella, and the annual flu shot. Recommended vaccines shift depending on destination and traveler profile — hepatitis A and typhoid, for instance, are frequently recommended for travelers to regions with lower sanitation standards, even for relatively short trips. The CDC site is updated when new outbreaks are confirmed, which is another reason to check it close to your departure date rather than when you first start planning.
Book the Consultation Before You Book the Flight
Travel health consultations are available through dedicated travel clinics — Passport Health operates locations across the United States — as well as through some primary care practices and academic medical centers. Some clinics offer consultations by appointment only; others accept walk-ins. The timing matters more than people realize. Certain vaccine series require multiple doses spaced weeks apart. A hepatitis B course, for example, typically spans six months on the standard schedule, though an accelerated schedule exists. Typhoid and rabies vaccines also require lead time. Arriving at a travel clinic two days before departure closes off several options entirely.
Cost varies. A travel health consultation at Passport Health typically runs $65–$85 depending on location. Vaccines are billed separately, and prices range considerably — a yellow fever vaccine can cost $150–$300 at a travel clinic, while hepatitis A runs roughly $90–$150 per dose. Insurance coverage for travel vaccines is inconsistent; many plans don’t cover vaccines deemed elective, though some will cover hepatitis A and B as standard preventive care. It’s worth calling your insurer before the appointment rather than after.
The yellow fever vaccine, to return to the concrete: it confers immunity in roughly 99% of recipients after a single dose, and that protection is now considered lifelong by the WHO — the organization updated its guidance in 2016 to eliminate the previous 10-year booster requirement. One shot, taken at least 10 days before travel to a risk area, and you’re covered indefinitely.
