Calculating mortality requires knowing precisely who is infected, including those who are asymptomatic. It would also require understanding the overall health status of those supposedly suffering. I think it probable those being counted as suffering from this Corona virus have a whole lot of other issues as well or don't have this virus at all, but are thrown in with the lot.
I have a hard time accepting ANY government produced numbers about ANYTHING. So eat healthy and keep your immune system well tuned. Oh, I recommend organic smokes too.