Updates to the Online Edition of CDC Yellow Book 2020: Health Information for International Travel

This webpage will contain a listing of permanent changes made to the online text of CDC Yellow Book 2020: Health Information for International Travel since its May 2019 hardcopy release.

Changes will also be indicated within the online sections.

Remember to also check for current recommendations related to outbreaks or emerging situations in Travel Notices that may differ temporarily from recommendations in the CDC Yellow Book 2020.

Content Changes

Updated Yellow Fever Vaccine Information

June 02, 2021

Updated Yellow Fever Vaccine & Malaria Prophylaxis Information, by Country page to reflect recent changes to yellow fever vaccine information. 

Updated Information about Legionnaires’ disease

April 23, 2021

Upper temperature of warm water temperatures that amplify Legionnaires’ disease updated from 108° to 113°.

Updated Yellow Fever Vaccine Information

April 09, 2021

Updated the Yellow Fever section to reflect the end of the YF-VAX shortage.

Updated Typhoid & Paratyphoid Fever Section

March 04, 2021

Updated Typhoid & Paratyphoid Fever section with an alert box about cases of extensively drug-resistant Salmonella Typhi infection that have been reported in the United States among people without recent international travel.

Updated Lyme disease international testing recommendation

February 23, 2021

Updated Lyme Disease section to reflect the new recommendation for serological tests used to diagnose internationally acquired infections.

Updated Yellow Fever Vaccine Information

December 21, 2020

Updated to reflect recent changes to Yellow Fever recommendations by country.

Typhoid vaccine availability

December 01, 2020

The typhoid and paratyphoid section was updated with information about oral vaccine availability.

Cholera vaccine availability

December 01, 2020

The cholera section was updated with information about availability of Vaxchora.

Updated polio information

September 15, 2020

In the Epidemiology section, information about wild poliovirus circulation was updated for 2020.

Updated Zika diagnosis information

June 09, 2020

Updated the Diagnosis section on the Zika page

Updated hepatitis B vaccine information

November 21, 2019

Updated the Last-Minute Traveler to include information on Heplisav-B

Updated triclabendazole information

October 23, 2019

Updated Fascioliasis to reflect the approval of triclabendazole for treatment.

Updated yellow fever vaccine requirements

August 16, 2019

Updated yellow fever vaccine requirements for Afghanistan, Australia, Bangladesh, Bhutan, Burundi, China, Christmas Island (Australia), Costa Rica, Djibouti, Dominican Republic, Ecuador, including the Galápagos Islands, Equatorial Guinea, Eswatini (Swaziland), Guinea, Honduras, Kiribati, Libya, Maldives, Mauritius, Nauru, Norfolk Island (Australia), Pakistan, Panama, Papua New Guinea, Philippines, Pitcairn Islands (UK), Réunion, Sint Maarten, Solomon Islands, Thailand, Timor-Leste, Trinidad and Tobago, and United Arab Emirates