C limate change presents a significant and growing threat to human health, with diverse impacts projected for different regions. 1 Investigators now report that Pacific island countries including Fiji, Tonga, and the Marshall Islands are among the nations most vulnerable to climate-related health problems due to their particular geographic, demographic, and socioeconomic characteristics. 2 Their new paper is a synthesis of the key technical findings and policy implications of the 2015 World Health Organization report Human Health and Climate Change in Pacific Island Countries , written by the same group. 3展开▼