a comparative study of asthma, pollen, cat and dog allergy among pupils and allergen levels in schools in taiyuan city, china, and uppsala, sweden.we compared the school environment, asthma and allergy in 10 schools in taiyuan, china, with eight schools in uppsala, sweden. in total 2193 pupils (mean age 13 years) participated. chinese pupils had more respiratory symptoms, particularly daytime breathlessness after exercise (29.8% vs. 7.1%; p < 0.001), while cat allergy (1.2% vs. 6.6%; p < 0.001) and dog allergy (1.3% vs. 4.0%; p < 0.01) was less common. cumulative incidence of asthma (1.8% vs. 9.5%; p < 0.001) and doctor's diagnosed asthma ...200617100662
serological reports of human infections of h7 and h9 avian influenza viruses in northern china.h7 and h9 subtype avian influenza viruses pose a similar threat to humans as h5 virus.200919186101
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