Those are the known cases.  Lets assume 70 million people in the US get Covid 19.  80% get better with no treatment and 20% need medical attention.  That means 14 million need medical help.  Now, it if the death rate is 7% of them. it would mean just under 1 million dead.  That is horrible but it's only a fraction of 1% of out total population.  This is horrible but even if the death rate of those needing medical attention were 20%, 2.8 million, it would still be less that 1% of our population, with most of them being elderly with medical problems.  This is scary but we will go on and as FDR said, "the only thing we have to fear is fear itself."  Today isvthe day American's and the rest of the world should listen to FDR and follow his advice.
Now, these numbers are high.  I used them only to put the worst case scenario in light.  I know I am going to get killed for putting these numbers up but we all need to be positive and plan for the worst but expect it will be much lower than this.