I appreciate your review of the CDC’s COVID-19 dashboard. You highlight several key strengths of the dashboard, such as bar charts for displaying trends over time, ongoing updates to real-time data, and color choices for accessibility. I agree that these elements contribute to a user-friendly and informative visualization.
By the way, I share your concern regarding the filter by date range (zoom feature). While it offers detailed data visualization capabilities, it can be challenging for the general audience to use as they need to take a good look to see how this feature works, Perhaps an alternative method for this feature, such as a button-based or date selection, could improve this aspect.