How does the air we breathe affect our body’s reaction to COVID-19? Early on in the pandemic Francesca Dominici, Gamble professor of biostatistics, population, and data science at the Harvard T.H. Chan School of Public Health, explored this question with her team. On this episode, she discusses the links between fine particulate matter in the air and COVID-19 outcomes. Dominici also discusses the pressure placed on scientists by government and media during public health crises—when answers are needed before conclusions exist. She concludes by describing how the government could help scientists reach conclusions faster, by collecting and releasing more (and better) data to scientists.