CDC Health Information for International Travel (commonly called the Yellow Book) is published every two years as a reference for health professionals providing care to international travelers and is a useful resource for anyone interested in staying healthy abroad. The fully revised and updated CDC Yellow Book 2018 codifies the U.S. government's most current travel health guidelines, including pretravel vaccine recommendations, destination-specific health advice, and easy-to-reference maps, tables, and charts.
The new version is available for purchase; it will go online after it is formally debuted at a travel medicine conference this week.
One big change is that, with the release of a new cholera vaccine, the CDC is now recommending immunization for many travelers. This is NOT Dukoral, which provides only limited protection, but rather Vaxcora, an Ralph vaccine.