Travel Health Notices

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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

Level 1 - Practice Usual Precautions

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.