The Huck Institutes of the Life Sciences

Chronic illness causes less harm when carnivores cooperate

Gray wolves in Yellowstone National Park have given researchers the first scientific evidence from wild mammals that living in a group can lessen the impacts of a chronic disease.
http://news.psu.edu/story/357823/2015/05/18/research/chronic-illness-causes-less-harm-when-carnivores-cooperate