The flu epidemic has invaded 48 states, overwhelming medical facilities, exhausting vaccine supplies, and killing 29 children and many seniors.

Both the problem and solution to this disaster hinge on how we relate to animals raised for food.

Indeed, 61 percent of the 1,415 pathogens known to infect humans originate with animals. The more recent, contagious, deadly viruses among these include Asian, dengue fever, Ebola, H5N1 (bird), HIV, SARS, West Nile, and yellow fever. The pandemic Spanish flu of 1918 killed between 20 million and 50 million people worldwide, and the World Health Organization predicts more pandemics in the future.

Today’s factory farms are virtual flu factories. Sick, crowded, highly stressed animals in contact with contaminated feces and urine provide ideal incubation media for viruses. As these microbes reach humans, they mutate to defeat the new host’s immune system, then propagate by contact.

Each of us can help end animal farming and build up our own immune system against the flu by replacing animal products in our diet with vegetables, fruits and whole grains. These foods don’t carry flu viruses or government warning labels, are touted by every major health advocacy organization, and were the recommended fare in the Garden of Eden.