Some international destinations have circulating poliovirus. Before any international travel, make sure you are up to date on your polio vaccines. Country List : Afghanistan, Algeria, Benin, Cameroon, Chad, Côte d'Ivoire (Ivory Coast), Democratic Republic of the Congo, Niger, Nigeria, Pakistan, Somalia, Yemen, Sudan, Angola, Ethiopia, Republic of South Sudan, Djibouti, Germany, United Kingdom, including England, Scotland, Wales, and Northern Ireland, Papua New Guinea, Central African Republic, Tanzania, including Zanzibar, Laos, Namibia, Mali, Malawi, Zambia, Togo, Israel, the West Bank and Gaza

An increased number of cases of yellow fever have been reported in Colombia.

There is an outbreak of hepatitis A (HAV) in Costa Rica. Most cases have been reported in San José province.

There is an outbreak of chikungunya in Nicaragua. You can protect yourself by preventing mosquito bites.

Dengue is a year-round risk in many parts of the world, with outbreaks commonly occurring every 2–5 years. Travelers to risk areas should prevent mosquito bites. Country List : Colombia, Vietnam, Maldives, Bolivia, Cambodia, Kenya, Malaysia, Sri Lanka, Bangladesh, Costa Rica, Marshall Islands, Vanuatu Country List : Colombia, Vietnam, Maldives, Bolivia, Cambodia, Kenya, Malaysia, Sri Lanka, Bangladesh, Costa Rica, Marshall Islands, Vanuatu

CDC recommends practicing enhanced precautions for travel to Uganda or to provinces in the Democratic Republic of the Congo (DRC) not affected by the current Bundibugyo virus disease (BVD) outbreak. Country List : Democratic Republic of the Congo, Uganda Country List : Democratic Republic of the Congo, Uganda

Cases of paratyphoid fever are being reported in returning travelers from Yemen. You can prevent paratyphoid fever by practicing safe eating and drinking habits.

There are outbreaks of diphtheria in several countries in Africa. Vaccination against diphtheria is essential to protect against the disease. Country List : Chad, Guinea, Niger, Nigeria, Mali, Mauritania, Somalia Country List : Chad, Guinea, Niger, Nigeria, Mali, Mauritania, Somalia Country List : Chad, Guinea, Niger, Nigeria, Mali, Mauritania, Somalia Country List : Chad, Guinea, Niger, Nigeria, Mali, Mauritania, Somalia, Senegal Country List : Chad, Guinea, Niger, Nigeria, Mali, Mauritania, Somalia, Senegal Country List : Chad, Guinea, Niger, Nigeria, Mali, Mauritania, Somalia, Senega Country List : Chad, Guinea, Niger, Nigeria, Mali, Mauritania, Somalia, Senegal

Cases of Zika are being reported in returning travelers from Bali, Indonesia. All travelers to Bali should take steps to prevent mosquito bites and sexual transmission of Zika virus during and after travel.

CDC recommends avoiding all travel to Ituri and Nord-Kivu (North-Kivu) provinces in the Democratic Republic of the Congo (DRC) due to the current Bundibugyo virus disease (BVD) outbreak unless traveling for humanitarian aid or emergency response.

CDC recommends avoiding nonessential travel to Haut-Uélé and Tshopo provinces in the Democratic Republic of the Congo (DRC) due to the current Bundibugyo virus disease (BVD) outbreak.

There is an outbreak of chikungunya in northwest Costa Rica. You can protect yourself by preventing mosquito bites.

There is an outbreak of diphtheria in Haiti. Vaccination against diphtheria is essential to protect against the disease.

Increased cases of malaria have been reported in Yemen, including in areas that were previously considered low-risk.