<div>The COVID-19 pandemic began at the very end of 2019 in Wuhan city, Hubei province, China. However, its spread soon began to threaten the health of the whole country and then of the world, leading to nearly 5.7 million cases and over 355,000 dead as of today. A new study, published on the preprint server medRxiv* in May 2020, explores the effects of air pollution on COVID-19 infections in China.</div>