Some of the most common health problems linked with travel to developing countries are:

• Traveler's diarrhea. This is by far the most common risk. It affects up to 4 out of 5 international travelers, based on their destination.
• Enterotoxic E. coli diarrhea.
• Malaria.
• Acute febrile respiratory tract infections.
• Influenza.

Less common infections may also be a risk in certain areas. Some are related to sexual contact with an infected person. Less common infections include:

• Hepatitis (A, B, and C).
• Gonorrhea.
• Animal bites with rabies.
• Typhoid and paratyphoid fever.
• HIV.
• Legionella.
• Cholera.
• Meningococcal disease.
• Dengue fever.
• Prion diseases.
• Yellow fever.
• Tuberculosis.
• SARS (severe acute respiratory syndrome).
• Poliomyelitis.
• COVID-19.

For the most current CDC travel advisories, visit the CDC Traveler's Health website.