Hello, this is Sungmo Best Internal Medicine in Siheung. Many of you are probably planning international trips for the upcoming long holiday. While this is an exciting time, from a medical professional's perspective, there is one concern.
That concern is that many people travel without adequately considering pre-departure vaccinations. Given that travel is more than just relaxation—it involves contact with unfamiliar environments—vaccinations are closer to a necessity than an option.
Today, from the perspective of a medical professional at a Siheung internal medicine clinic, we will summarize the necessity of vaccinations to get before international travel and how to prepare for them, especially with a long holiday approaching.
Why International Travel Can Be a 'Risk Factor' for Your Health
Travel is an enjoyable experience, but when combined with different hygiene environments, water management, climates, and endemic diseases abroad, it can be difficult to ensure safety by simply managing your condition.
- Risk of contact with infectious disease outbreak areas: Regions in Southeast Asia and parts of Africa still have high rates of Hepatitis A, Typhoid, and Malaria. Even diseases that are rare or well-managed domestically can easily be encountered locally.
- Difficulty with hygiene management during travel: Encountering unfamiliar food, unstable drinking water, and street food can easily lead to digestive illnesses. Without vaccinations, you might unfortunately spend your entire short trip in a hospital room or bathroom.
- Limited access to medical care during holidays: If an emergency occurs in an unfamiliar country, it is often difficult to receive timely treatment due to language barriers, insurance issues, and differences in medical standards. This is why 'prevention' before departure is the most realistic preparation.
Commonly Recommended Vaccinations Before Travel
These are the travel-related vaccinations most frequently explained in the examination room at our Siheung internal medicine clinic. They may vary depending on your travel destination, duration of stay, and personal health status, so you must consult with medical staff before vaccination.
| Vaccine | Especially Important In These Cases |
|---|---|
| Hepatitis A | Infection from contaminated food and water. Common in Southeast Asia, China, India, etc. |
| Typhoid | Occurs in areas with unstable hygiene. Can lead to fever, abdominal pain, and intestinal bleeding. |
| Tetanus, Diphtheria, Pertussis (Tdap) | Risk of infection from injuries. When planning outdoor activities or backpacking trips. |
| Influenza (Flu) | Spreads regardless of season in crowded environments such as airports, hotels, and on planes. |
| Measles (MMR) | Highly airborne and recently re-emerging domestically and internationally. |
Measles (MMR): Why Recheck?
With the recent re-emergence of measles domestically and internationally, checking your MMR vaccine status before travel has become important. Measles is highly airborne and can be contracted through brief contact. In particular, some regions in Europe and Asia have high incidence rates, and traveler infections are consistently reported.
The MMR (Measles, Mumps, Rubella) vaccine is typically given twice in childhood, but some adults may have uncertain vaccination histories or lack antibodies. It is safer to check your vaccination history before travel and receive an additional dose if necessary. Measles is not just a simple fever and rash illness; it carries a high risk of complications like pneumonia and encephalitis. If it occurs during travel, it can lead to issues with returning home and isolation, so caution is needed.
When and Where to Get Vaccinated
- Vaccination Period: Most vaccines take at least two weeks to form antibodies after administration. Ideally, you should plan your vaccinations at least four weeks before departure, but even if departure is imminent, it is better to get any available vaccines immediately.
- Vaccination Location: Most travel vaccines can be administered at general Siheung internal medicine clinics. You can find information on specific items at Vaccinations.
- Individual Considerations: Children, pregnant women, the elderly, and those with chronic diseases must consult with medical staff regarding the necessity and type of vaccination. It is also necessary to check past vaccination history and immunity status.
Health Management Checklist Before International Travel
In addition to vaccinations, here are a few checks to ensure a healthy trip.
- Pre-departure Health Check: If you have chronic diseases such as high blood pressure, diabetes, or heart disease, it is advisable to confirm your current condition with an internal medicine consultation before departure. If you are curious about examination and testing procedures, please refer to Test Information.
- Medication Preparation: It can be difficult to obtain medications with the same ingredients abroad, so you should bring enough of any necessary medications.
- Hygiene Practices: Basic rules such as handwashing, drinking bottled water, and avoiding raw food are as important as vaccines.
- Travel Insurance: It is advisable to purchase travel insurance in advance to prepare for emergencies.
When these preparations are in place, travel truly becomes a time of genuine rest and enjoyment.
Vaccinations Are a 'Must-Have'
Long holidays are precious times for rejuvenation. However, travel can also involve unexpected variables and risks. Therefore, as medical professionals at a Siheung internal medicine clinic, we clearly state that pre-travel vaccinations are not an 'option' but a 'must-have preparation.' They are a small measure that not only prevents infection but also protects your trip and ensures a safe return to daily life.
If you are planning an international trip this holiday, please visit a nearby Siheung internal medicine clinic now to find out which vaccinations you need. Checking our Clinic Hours before your visit can make your trip lighter. A small preparation can protect your entire long journey.
We wish you a healthy trip and a happy return.
Dr. Kim Seonhoo (Specialist in Gastroenterology, Specialist in Gastrointestinal Endoscopy) · Meet Our Medical Team · Last reviewed 2026-08-06