Travel Health Notices
Search By Country Name or Disease
CDC uses Travel Health Notices (THNs) to inform travelers about global health risks during outbreaks, special events or gatherings, and natural disasters, and to provide advice about protective actions travelers can take to prevent infection or adverse health effects.
A THN can be posted for: 1) a disease outbreak (higher number of expected cases) in a country or region, 2) sporadic cases of a disease in an unusual or new geographic location, 3) natural and human-made disasters with severe environmental health risks, or infrastructure damage that would limit healthcare services availability and 4) mass gathering events that can lead to disease outbreaks. See types of travel notices.
Level 4 - Avoid All Travel
- Currently there are no Travel Health Notices at this level.
Level 3 - Reconsider Nonessential Travel
- Currently there are no Travel Health Notices at this level.
Level 2 - Practice Enhanced Precautions
- Updated Global Polio July 28, 2023 Some international destinations have circulating poliovirus. Before any international travel, make sure you are up to date on your polio vaccines. Read More >>
- Diphtheria in Nigeria July 21, 2023 There is an outbreak of diphtheria in several states in Nigeria. Vaccination against diphtheria is essential to protect against disease. If you are traveling to an affected area, you should be up to date with your diphtheria vaccines. Read More >>
- Fungal Infections Following Surgical Procedures in Mexico May 26, 2023 Recently, some US residents returning from Matamoros, Mexico, were diagnosed with fungal meningitis infections that have led to severe illness and death. Read More >>
- Yellow Fever in Nigeria May 04, 2022 There is an outbreak of yellow fever in Nigeria. Travelers to Nigeria should take steps to prevent yellow fever by getting vaccinated at least 10 days before travel and taking steps to prevent mosquito bites. Read More >>
Level 1 - Practice Usual Precautions
- Updated Dengue in the Americas July 25, 2023 Dengue is a risk in many parts of Central and South America, Mexico, and the Caribbean. Some countries are reporting increased numbers of cases of the disease. Travelers to the Americas can protect themselves by preventing mosquito bites. Read More >>
- Updated Dengue in Asia and the Pacific Islands July 25, 2023 Dengue is a risk in many parts of Asia and the Pacific Islands. Some countries are reporting increased numbers of cases of the disease. Travelers to Asia and the Pacific Islands can protect themselves by preventing mosquito bites. Read More >>
- Updated Dengue in Africa and the Middle East July 25, 2023 Dengue is a risk in many parts of Africa and the Middle East. Some countries are reporting increased numbers of cases of the disease. Travelers to Africa and the Middle East can protect themselves by preventing mosquito bites. Read More >>
- Global Measles June 29, 2023 Many international destinations are reporting increased numbers of cases of measles. Read More >>
- XDR Typhoid Fever in Pakistan June 16, 2023 An outbreak of extensively drug-resistant (XDR) typhoid fever in Pakistan is ongoing. Extensively drug-resistant infections do not respond to most antibiotics. Read More >>
- Chikungunya in Paraguay April 06, 2023 There is an outbreak of chikungunya in Paraguay. Most cases have been reported in the Asunción metropolitan area. Mosquitos spread the virus that causes chikungunya. Read More >>
- Salmonella Newport in Mexico September 08, 2022 Some travelers who have spent time in Mexico have been infected with multidrug-resistant (MDR) Salmonella Newport. Read More >>
Types of Notices
Level 4 – Avoid All Travel
Avoid travel to this destination unless traveling for humanitarian aid or emergency response; there is an extreme health risk for travelers and no available precautions.
Level 3 – Reconsider Nonessential Travel
Reconsider nonessential travel to this destination. The outbreak or event poses risk to travelers because limited precautions are available.
Level 2 – Practice Enhanced Precautions
Practice enhanced precautions for this destination. The Travel Health Notice describes additional precautions or defines a specific population at risk.
Level 1 – Practice Usual Precautions
Practice usual precautions for this destination, as described in the Travel Health Notice and/or on the destination page.
Visit U.S. Department of State's website for the latest Travel Advisories.
Page last reviewed: July 28, 2023