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The impact of smoke on respiratory hospital outcomes during the 2002–2003 bushfire season, Victoria, Australia

Background and objective:  Uncontrolled bushfires produce copious amounts of smoke that can result in adverse effects on human health and so are important considerations for emergency, public health and environmental protection agencies. During January to March 2003, the north‐east and Alpine regions of the state of Victoria experienced major bushfires that created a blanket of smoke over the entire state for extended periods of time. This study aimed to explore the daily trends in air pollutants and temporal correlations with changes in respiratory outcomes and to determine whether variation in particulate matter < 10 µm (PM10), visibility‐reducing particles and ozone produced by bushfires could explain variation in respiratory outcomes.