Veterinary Medicine
DES MOINES, Iowa - Low-cost vaccines that may help prevent the kind of salmonella outbreak that has led to the recall of more than a half-billion eggs haven't been given to nearly half the nation's egg-laying hens.
DES MOINES, Iowa - Low-cost vaccines that may have helped prevent the kind of salmonella outbreak that has led to the recall of more than a half-billion eggs haven't been given to half of the nation's egg-laying hens.
