In 2007, a US National Park Service (NPS) biologist working in Grand Canyon National Park in the state of Arizona died from pneumonic plague contracted from a mountain lion, prompting NPS, in partnership with local and federal agencies, to inform publics about plague risk within park contexts....

Social science research in the field of risk analysis has emphasised evaluating the magnitude of individuals' reactions to risks (e.g. strength and salience of concerns, frequency and forcefulness of behaviours that respond to risks). Fewer studies assess the factors that contribute to risk...