3.4% is nonsense
Diamond Princess had 3711 passengers. They were ALL tested. 638 tested positive, 306 presented symptoms, 6 died.
0.95% mortality rate
Other #'s are only significantly higher because they're not testing everyone, so there are a lot of minor cases that aren't being recognized which skews statistics.
I'm not saying it isn't more serious than the flu. It is. But 3.4% is still misinformation. The CDC and WHO know it's not that high as well, it's why they haven't published official mortality rate estimates.
Here's the problem. 17% of the people on that boat had it. 0.95% of those died.
There are 327.2 million americans. If 17% of us get it (and it's estimated that way more than that will), that's 55,624,000 Americans with the sickness. If 0.95% of those die, that is still 528,428 dead Americans.