UHS deems protection against yellow fever necessary and, in fact, some countries require all travelers to show proof of immunization.
The Centers for Disease Control (CDC) also prints a guide for international travelers, which provides exhaustive details about health concerns abroad.
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Alternatively, students can consult the CDC's Web site at www.cdc.gov/travel/#Geographic for regional information about diseases.
Harvard students planning to journey far afield should use the information from both the CDC and UHS, Rosenthal says.
"Always plan ahead for international travel," he adds.