TRAVEL IS broadening. Unfortunately, it may also be diarrhetic, emetic, toxic . . . that is to say, a vehicle for exposing the body to unfamiliar ills even as it opens up new vistas for the mind.
As people who live in the industrialized countries of the world make more forays for pleasure or business into global areas that are less developed, many physicians in the voyagers' homelands are finding their diagnostic acumen challenged by diseases that have disappeared from, or were never common in, the places where they practice.
Goldsmith MF. Health Woes Grow in Shrinking World. JAMA. 1998;279(8):569-571. doi:10.1001/jama.279.8.569