Observed Impacts of Climate Change on Health, Well-Being, Migration and Conflict 7.2.1 Observed Impacts on Health and Well-Being Eleven categories of diseases and health outcomes have been identified in this assessment as being climate-sensitive through direct pathways (e.g., heat and floods) and indirect pathways mediated through natural and human systems and economic and social disruptions (e.g., disease vectors, allergens, air and water pollution, and food system disruption)