Check food and water safety guidelines for a destination to inform decisions about dietary precautions.
Tips
Start planning vaccinations 4–6 weeks before departure — some vaccines require a series (hepatitis A, rabies) and must be started weeks in advance.
Check both destination country and transit country health requirements — many countries require yellow fever vaccination even for transit passengers.
Travel to high-altitude destinations (above 2,500m) requires acclimatization planning — acetazolamide for altitude sickness is prescription-only and must be obtained before departure.
Fun Facts
Yellow fever vaccination is required by 42 countries for entry and recommended for travel to tropical regions of South America and Africa. It provides 99% immunity for life after a single dose.
Malaria kills approximately 608,000 people annually (2021 WHO data), predominantly in sub-Saharan Africa. Prophylactic medication (atovaquone-proguanil, doxycycline, mefloquine) reduces infection risk by 70–95% in high-transmission regions.
The WHO's International Travel and Health guide ('The Green Book') has been published annually since 1969 and is the primary reference for travel medicine physicians worldwide.
FAQ
Which vaccines are required vs. recommended for international travel?
Required: yellow fever for specified countries (legally enforced at entry). Routine: ensure standard vaccines are up to date (MMR, tetanus, hepatitis B). Recommended: destination-specific (hepatitis A, typhoid, rabies, meningitis) based on activities and region.
Where can I get travel health advice before a trip?
Travel medicine clinics and tropical medicine departments provide destination-specific advice. The CDC Travelers' Health site (cdc.gov/travel) and WHO's International Travel Health pages are the standard public references.
