As a precautionary measure, WHO has recommended that persons traveling
to Hong Kong and Guangdong Province of China consider postponing all but essential
travel. CDC has issued a travel advisory recommending that persons planning
nonessential or elective travel to mainland China, Hong Kong, Hanoi, or Singapore
consider postponing such travel until further notice. To detect possible SARS
cases among travelers returning to the United States from these areas, CDC
and state and local health authorities have implemented enhanced surveillance.
Since March 16, notices (available in English, Chinese, Japanese, Korean,
and Vietnamese) have been provided to approximately 220,000 passengers arriving
in the United States on airline flights originating from China, Vietnam, and
Singapore to inform disembarking passengers and crew about SARS. Persons disembarking
from these countries are urged to monitor their health for 10 days after return,
to seek medical care if they develop fever of ≥100.5°F (39.0°C)
and cough or difficulty breathing within 10 days of travel, and to inform
their health-care providers about recent travel to regions where SARS cases
have been reported.