MicrobeWorld

The emergence of international air travel in the 20th century enabled an unprecedented spread of ideas, cultures and communication. Unfortunately, modern aviation has also proved an effective means of spreading diseases. Air travel didn’t introduce worldwide pandemics, of course, but with tens of millions of scheduled international flights annually and hundreds of millions of passengers en route from high-risk areas, health officials are often hard pressed to pinpoint the source and cause of an international outbreak.

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