There has been a growing consensus that Covid19 was here long before March, as we didn't even test for it. The new story about the first known death having been in Santa Clara Feb. 6 proves this is the case, especially as these had no known travel to China. Had to be circulating in January or earlier.
There are likely hundreds or more that died this winter that are attributed to flu, or simply "pneumonia." In the end, the pulmonary damage that kills is hard to differentiate by cause, especially if not specifically looking for something else.
CDC was reporting early that this was an especially bad flu season, with higher death count. Likely some or many were COVID19 related.
A family member of ours had pneumonia in mid February, in the ICU and hospital for over 2 weeks. ID docs thought it was TB, but tests were -. Could not grow any bacterial cultures or identify a known virus such as influenza.
I am hopeful that many more contracted the virus, did not die, and hopefully have some heightened or full immunity than we currently know.
I presume there are hundreds if not thousands of similar reports that exist if they could be aggregated.