

7 Travelers visiting friends and relatives in their country of origin constitute the group with the highest morbidity, especially from malaria and typhoid this group requires special approaches to illness prevention and education. 6 Data about the effect of pretravel advice are limited, although such advice has had a positive effect on the prevention of malaria. 5 Yet 20 to 80% of travelers do not seek pretravel health consultation. 1-4 Some travelers return to their own countries with preventable life-threatening infections. Depending on the destination, 22 to 64% of travelers report some illness most of these illnesses are mild and self-limited, such as diarrhea, respiratory infections, and skin disorders. In 2014, the total number of arrivals in countries with emerging markets nearly surpassed the number in developed countries ( ). In 2015, international tourist arrivals in all countries exceeded 1.2 billion persons.

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