罹患哮喘的最大风险因素是吸入可能导致过敏反应或刺激呼吸道的物质和颗粒。
Particle pollution - such as smoke, dust and heavy metals -- is known to irritate the airways and worsen asthma, and several studies have linked it to heart disease.众所皆知,颗粒污染,诸如烟、尘、重金属等,会刺激呼吸道,从而加重哮喘。 有几项研究也把颗粒污染与心脏病联系在一起。
It is also important to avoid asthma triggers - stimuli that irritate and inflame the airways.避免哮喘诱因刺激气道和导致发炎也是很重要的。