Coughing lately? UC Davis researchers, studying the impact of wildfire smoke, want to know more about how Northern California residents fared during  and after last year's fires.  KCBS Radio Reporter Holly Quan says, surprisingly, there aren't many studies on the long term impact of urban wildfire smoke. 

<p>Coughing lately? UC Davis researchers, studying the impact of wildfire smoke, want to know more about how Northern California residents fared during&nbsp; and after last year's fires.&nbsp; KCBS Radio Reporter Holly Quan says, surprisingly, there aren't many studies on the long term impact of urban wildfire smoke.&nbsp;</p>

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