Well, I don't believe you have taken into account ALL of the people in the US that are now infected with Covid 19. So many more are infected than are "confirmed". You seriously don't think that only 340 people are infected with this virus do you? That is just the confirmed total. You CANNOT extrapolate that to a death rate. Not in a million years. Here is an example. Of the 45 people they tested on the ship outside of San Fran, 21 tested positive for Covid 19. Out of 3,500 people on the boat. Why do you think they tested the 45? Because they showed fever or other symptoms. The rest have the infection or maybe 1/2 of the rest. Surely you don't think just 45 people on a "closed system" like a cruise ship have this virus? No they just tested the sick ones. Many thousands of people right now in the US have or have had this infection. The symptoms are very mild for many people. This is NOTHING to get excited about and start throwing around huge death rates like 4 percent or the 40 to 60 percent of the bubonic plague in the middle ages. Everyone is on edge for no good reason. Wash your hands, don't cough on people, and stay home if you feel sick. That is all there is to this.
An official from the Health and Human services came out yesterday and said the death rate is between .1 and 1 percent. They just don't have enough testing done, and the Chinese are not forthcoming with their data to pin it down any better. When this is all said and done the death rate WILL NOT be much if any higher than Annual Flu. You will see. Did we need this "new virus"... no. we sure didn't. Not on top of the already 18,000 dead we have this season, or the extra 14,000 we had from H1N1 back a few years ago. But it ain't Bubonic plague. And it aint Ebola. And we ain't all gonna die. (Small comfort for someone that does die, and their loved ones)
The thing to watch is NOT the number that have died, but the number that have recovered. That line is going up at a steep angle. The confirmed cases is nearly a flat line. When they get close to intersecting, we are done with this latest plague.