Featured series 
Tag: Respiratory Diseases
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Nation & World
‘Smoke waves’ will affect millions in coming decades
Wildfires threaten more than land and homes. The smoke they produce contains fine particles (PM2.5) that can poison the air for hundreds of miles. Air pollution from the 2016 Fort…
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Nation & World
The hunt for healthy answers
JoAnn Manson leads a nationwide study to assess whether vitamin D and omega-3 fatty acids can boost immunity and protect against ailments from heart disease to cancer.
