The Fourth Ministerial Meeting of the Regional Forum on Environment and Health in Southeast and East Asian Countries was held in Manila, Philippines, on 6–8 October 2016, as the Asia-Pacific Regional Forum on Health and Environment, reflecting the wider participation of countries from across the two WHO regions of South-East Asia and the Western Pacific. The Regional Forum included the following events: 1. Scientific Dialogue on Environment and Health at the Centre of Sustainable Development (Thursday, 6 October 2016); 2. Ninth High Level Officials Meeting (Friday, 7 October 2016); and 3. Fourth Ministerial Meeting (Saturday, 8 October 2016).