Once a month
get new photos
and expert tips.

Science and Space
Main Health and Human Body Earth Space Prehistoric World A-Z

Photo Gallery: Influenza

PREVIOUS10 of 10


Pigs sniff for food at a farm on the outskirts of Mexico City, where an outbreak of swine flu was blamed for the deaths of more than a hundred people in April 2009. Swine flu is a respiratory virus, spread from person to person. It originally jumped from pigs to humans in close contact with the animals, such as farmers. Photograph by Marco Ugarte/AP