Since we do not test everyone, and I am not advocating that we do, there is only a statistical guess as to how many have been infected, but even the CDC numbers have previously stated that the death rate is no higher than the flu and probably about the flu rate.
Previously, we only tested symptomatic people so the death rate stayed pretty high. When we started testing everyone, the numbers plummeted and I mean dramatically. I also started to see strange data anomalies like negative active cases.