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Flu Prevention

Photo: Veterinary workers disinfecting car

Careful not to transport the H5N1 avian flu virus out of a contamination zone, veterinary workers disinfect their vehicle in the northwest region of Serbia and Montenegro. But car travel is just the beginning. If the virus begins to spread from human to human, jet travel will put the world at even greater risk.

Photograph by Dimitar Dilkoff/AFP/Getty Images