International Journal of Environmental Research and Public Health Review Acute Health Impacts of the Southeast Asian Transboundary Haze Problem—A Review Kang Hao Cheong 1,* , Nicholas Jinghao Ngiam 2 , Geoffrey G. Morgan 3, Pin Pin Pek 4,5, Benjamin Yong-Qiang Tan 2, Joel Weijia Lai 1, Jin Ming Koh 1, Marcus Eng Hock Ong 4,5 and Andrew Fu Wah Ho 6,7,8 1 Science and Math Cluster, Singapore University of Technology and Design, Singapore 487372, Singapore 2 Division of Neurology, Department of Medicine, National University Health System, Singapore 119074, Singapore 3 School of Public Health, The University of Sydney, Sydney, NSW 2006, Australia 4 Department of Emergency Medicine, Singapore General Hospital, Singapore 169608, Singapore 5 Health Services & Systems Research, Duke-NUS Medical School, Singapore 169857, Singapore 6 SingHealth Duke-NUS Emergency Medicine Academic Clinical Programme, Singapore 169857, Singapore 7 National Heart Research Institute Singapore, National Heart Centre, Singapore 169609, Singapore 8 Cardiovascular & Metabolic Disorders Programme, Duke-NUS Medical School, Singapore 169857, Singapore * Correspondence:
[email protected] Received: 20 August 2019; Accepted: 29 August 2019; Published: 6 September 2019 Abstract: Air pollution has emerged as one of the world’s largest environmental health threats, with various studies demonstrating associations between exposure to air pollution and respiratory and cardiovascular diseases. Regional air quality in Southeast Asia has been seasonally affected by the transboundary haze problem, which has often been the result of forest fires from “slash-and-burn” farming methods. In light of growing public health concerns, recent studies have begun to examine the health effects of this seasonal haze problem in Southeast Asia.