  In response to COVID-19, a vast number of visualizations have been created to
communicate information to the public. Information exposure in a public health
crisis can impact people's attitudes towards and responses to the crisis and
risks, and ultimately the trajectory of a pandemic. As such, there is a need
for work that documents, organizes, and investigates what COVID-19
visualizations have been presented to the public. We address this gap through
an analysis of 668 COVID-19 visualizations. We present our findings through a
conceptual framework derived from our analysis, that examines who, (uses) what
data, (to communicate) what messages, in what form, under what circumstances in
the context of COVID-19 crisis visualizations. We provide a set of factors to
be considered within each component of the framework. We conclude with
directions for future crisis visualization research.
