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Nov 13, 2019 · However, PM10 is not the long term danger that PM2.5 is. There is good evidence of the effects of short term exposure to PM10 on respiratory health, but for mortality, and especially as a consequence of long term exposure, PM2.5 is a stronger risk factor than the coarse part of PM10 (particles in the 2.510 m range).
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This national cohort study of more than 1.3 million births in China from December 1, 2013, to November 30, 2014, assesses the association of concentration of airborne particulate matter of 1 m or less with the risk of preterm birth and identifies subgroups of pregnant women who may be vulnerable.