Representative scientific research project: epidemiological evaluation of family intervention model of human brucellosis, Youth Fund of National Natural Science Foundation, 201-2014.12 Representative academic papers Yao Yan, Wang Ning, Ding Guowei, Chang Dongfang, Wang Guixiang, Xu Junjie, Jin Xia, Qiu Maofeng. HIV detection based on the characteristics of clients and their semen samples [J]. China Journal of Epidemiology, 2008,29 (7): 651. Yang Fang, *, Lee Hung, et al. Study on the status quo and related factors of nurses' health productivity damage in Yan [J]. China Journal of Health Management, 20 12. And the application of others' Montreal cognitive assessment scale in the diagnosis of mild cognitive impairment [J]. Journal of Jilin University (Medical Edition, 2012,38 (4): 730-735. Yang Fang, Guo, et al. Meta-analysis of the diagnostic value of quantitative ultrasound in osteoporosis [J]. China Journal of Osteoporosis, 2066. , Wang,, et al. Study on the risk prediction of adult obesity in diabetic patients [J]. China Journal of Health Management, 2012,6 (1): 58-60. Yao Yan, Zhang Tianyi, Yang Fang, et al. Meta-analysis of rosiglitazone in the treatment of Alzheimer's Harmo disease [J]. Journal of Jilin University. 38(2):296-302. Yao Yan, Yang Fang, Wang Guanjun, et al. Individual risk assessment of female breast cancer [J]. Journal of Jilin University (Medical Edition), 201,37 (5): 880-884.