analysis of potential risk factors associated with the death of pH1N1 influenza severe cases in the first epidemic year.*

*Four pH1N1 sever cases were reported in the second epidemic year with one death and the dead case also had pre-existing chronic pulmonary disease.#OR = odds ratio.在第二次流行年共报告4例pH1N1重症病例，其中1例死亡，该死亡病例同时患有既往慢性肺部疾病。#OR（odds ratio）= 比值比。