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 Monkeypox Transmission Information
August 10, 2022
Updated Smallpox & Other Orthopoxvirus-Associated Infections page to clarify monkeypox transmission information.
Updated Malaria Prophylaxis Information
December 13, 2021
Updated Yellow Fever Vaccine & Malaria Prophylaxis Information, by Country page to reflect recent changes to malaria prophylaxis information.
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.
Cholera vaccine availability
December 01, 2020
The cholera section was updated with information about availability of Vaxchora.
Typhoid vaccine availability
December 01, 2020
The typhoid and paratyphoid section was updated with information about oral vaccine availability.
Updated polio information
September 15, 2020
In the Epidemiology section, information about wild poliovirus circulation was updated for 2020.
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