an epidemiological survey of 3216 primary school children living in the industrial , urban and rural areas of singapore revealed a high prevalence of various respiratory symptoms and illnesses , with 13.1 % cough , 8.2 % wheezy chest , 25.9 % blocked/running nose , 4.3 % sinusitis , 7.8 % asthmatic attacks and 4.1 % bronchitis/pneumonia .
C0817096
chest
C0006277
bronchitis