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Wildfires may be accelerating the spread of infectious disease by keeping US West residents indoors: Study
BRITISH COLUMBIA, OREGON, WASHINGTON, ALBERTA, WALES, JUN 18 – Wildfire smoke increases indoor crowding by up to 14%, raising risks of flu and COVID-19 spread as poor air quality drives people to stay inside, researchers report.
In early June 2025, widespread wildfires in northern regions caused thick smoke and air quality warnings affecting local communities and events.
The increased wildfire activity, including a 407 percent rise in fires between March and May 2025, led to concerns over health risks from smoke exposure.
Officials urged residents to reduce outdoor time, seal homes against smoke, and use HEPA air scrubbers, which Lac La Ronge Indian Band deployed in public health centres.
Cook-Searson said air scrubbers are very effective, and Henderson reported wildfire smoke increases risks for chronic diseases and adverse birth outcomes.
These events highlight the need for public education, indoor air quality measures, and community preparedness to mitigate wildfire smoke’s long-term health effects.