  Flow physics plays a key role in nearly every facet of the COVID-19 pandemic.
This includes the generation and aerosolization of virus-laden respiratory
droplets from a host, its airborne dispersion and deposition on surfaces, as
well as the subsequent inhalation of these bioaerosols by unsuspecting
recipients. Fluid dynamics is also key to preventative measures such as the use
of face masks, hand-washing, ventilation of indoor environments, and even
social distancing. This article summarizes what we know, and more importantly,
what we need to learn about the science underlying these issues so that we are
better prepared to tackle the next outbreak of COVID-19 or a similar disease.
