Respiratory symptoms were ascertained from questionnaire responses and broadly grouped into two (Pope III
and Dockery, 1999): upper respiratory symptoms (URS) like sinusitis, running or stuffy nose, sore throat, common cold and fever, and LRSlike dry cough, cough with phlegm, wheezing and chest discomfort.
Respiratory symptoms were ascertained from questionnaire responses and broadly grouped into two (Pope IIIand Dockery, 1999): upper respiratory symptoms (URS) like sinusitis, running or stuffy nose, sore throat, common cold and fever, and LRSlike dry cough, cough with phlegm, wheezing and chest discomfort.
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