The New York Times "has made public its comprehensive dataset of coronavirus cases in the United States to help researchers, scientists, government officials and businesses better understand the virus and model what may come next.”
https://www.nytimes.com/article/coronavirus-county-data-us.html
COVID-19 Open Research Dataset (CORD-19)
https://pages.semanticscholar.org/coronavirus-research
COVID-19 data in Dimensions
COVID-19 resources from Google has a link to Data and Insights.
Data from COVID-19 Act Now
Penn Medicine provides a COVID-19 Hospital Impact Model for Epidemics.(CHIME)