中文摘要：

随着我国大气污染模式的转变,大气PM2.5已成为我国城市大气的首要污染物.目前,国内外对大气颗粒物健康影响的研究重点也逐渐以粒径较小且毒性较大的PM2.5为主.本文对近年来有关大气PM2.5的健康影响进行概述,以加深公众对大气PM2.5健康危害的认识.

英文摘要：

With the changes in the pattern of ambient air pollution,fine particulate matter（PM2.5） has become one of the main pollutants with health concerns in China.The recent researches into the health effects of particulate matter have been focused on PM2.5,which is more toxic than larger size particles.In this review,we summarized the health effects of PM2.5 and the key mechanisms involved,in order to advance our understanding of its impact on human health.