Pandemic timeline as animated dot density map

<img width=“750” height=“602” src=“https://i0.wp.com/flowingdata.com/wp-content/uploads/2021/03/pandemic-timeline.png?fit=750%2C602&ssl=1" class=“attachment-medium size-medium wp-post-image” alt=“” loading=“lazy” srcset=“https://i0.wp.com/flowingdata.com/wp-content/uploads/2021/03/pandemic-timeline.png?w=2235&ssl=1 2235w, https://i0.wp.com/flowingdata.com/wp-content/uploads/2021/03/pandemic-timeline.png?resize=750%2C602&ssl=1 750w, https://i0.wp.com/flowingdata.com/wp-content/uploads/2021 …