Use the Exploratorium exhibit Cells to Scale to visualize how small a coronavirus really is and investigate the implications of its small size.

Find out more about the science of COVID-19 with the Exploratorium Learning Toolbox.

Update: On April 3, 2020, with increasing understanding of the novel coronavirus, the Centers For Disease Control and Prevention recommended wearing cloth masks in public when social distancing measures are hard to maintain. Due to limited supply, it is still recommended that the N95 masks discussed in this video be reserved for healthcare workers and other first responders.