The COVID-19 pandemic is a severe respiratory disease caused by the emergence of a new coronavirus, SARS-CoV-2, that very quickly spread in the human population. Fine particulate matter (PM) generated from combustion engines have been described as toxic to human health. Recent events stressed that high concentrations of PM of air pollution might favor the spread of SARS-CoV-2. Autumn approaches, air pollution will be accentuated because of weather condition. The risk of a second outbreak of Covid-19 pandemic is highly probable. Elucidating the role of PM of air pollution in the spread of the virus is thus urgent and crucial.

中文翻译：

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空气污染颗粒物是 Covid-19 大流行的媒介吗？

COVID-19 大流行是一种严重的呼吸道疾病，由新型冠状病毒 SARS-CoV-2 的出现引起，该病毒在人群中迅速传播。内燃机产生的细颗粒物 (PM) 被描述为对人类健康有毒。最近发生的事件强调，空气污染中的高浓度 PM 可能有利于 SARS-CoV-2 的传播。秋季临近，由于天气原因，空气污染将会加剧。Covid-19 大流行第二次爆发的风险极有可能。因此，阐明空气污染中的颗粒物在病毒传播中的作用迫在眉睫且至关重要。