Here is a real-time interactive county-level map of confirmed cases/deaths of COVID-19 for the continental USA based on data from 1P3A. It will update every 5 minutes if there is a change in data.
Cases: https://randel.github.io/COVID-19-US-county-map/
Deaths: https://randel.github.io/COVID-19-US-county-map/death
You can consider using this auto refresh tool for your browser and set to refresh the map every 5 minutes.