We won't know here right away because we have just started the roll out of accurate tests. This epidemiologist for the University of Tennessee explained the difficulty at yesterday's press conference re the first case in Memphis:
Dr. Jon McCullers, infectious disease expert at the University of Tennessee says it’s very possible more cases will be reported here soon.
“It would not be surprising if there is some coronavirus being mistaken for flu. We are not testing extensively yet for coronavirus.”
With limited test kits in the state, “we could have a lot of coronavirus out there,” he said.
We can look at Italy's numbers to get an idea of how the serious/critical numbers shake out. They seem to be testing well and have also seem to have honest people at the helm. They've been running at appx 10% in serious/critical condition the past few days.