As if there weren't enough reasons to buy local, humanely-raised, sustainably-farmed, locally-butchered organic meats, now there's the swine flu. Evolved from a strain that emerged in 1998 on factory farms in the U.S. and forged in the pathetic conditions of over-crowded, immune-stressed hogs shipped across the country from farm to slaughterhouse, we now have a highly-transmissable and dangerous flu jumping to humans.
For more reading on this subject, Wired Science has an article about the evolution of the latest swine flu from its 1998 origins, and the Humane Society's Factory Farming Campaign has more information as well.
What can we do to prevent future outbreaks? Either don't eat meat, or refuse to eat factory-farmed meat. Seek out local sources for meat, milk, and eggs. Look your food and food-producers in the eye and see the conditions in which they live. What's good for them is good for us. Remember that being green isn't just about saving the Earth, it's about saving us humans on it too.