COVID-19 has had a monumental impact on all our lives beginning March 2020. The evolution of data collected and published has been intriguing to watch. The State of California has a portal to access data, models and dashboards.
If you’re looking to do your own modeling or visualizations, access the data in the California Open Data Portal: https://data.ca.gov/group/covid-19
The State of California has produced dashboard using Tableau Public.