@pideh390
Here is update #7 which addresses your concern regarding the current mortality rate being inaccurate due to a lag between hospitalization and death.
Coronavirus Epidemic Update 7: Global Health Emergency Declared, Viral Shedding
www.youtube.com/watch?v=nW3xqcGidpQ
In case you cannot access the video, the long and short of it is:
1) Yes, the phenomenon you've cited is valid. Once the epidemic is over and all patients discharged, an official mortality rate will be calculated and recorded.
2) But because we are currently in the middle of the outbreak and we need a metric, however inaccurate, to measure the progression of the disease. And so, it is standard practice to use current numbers as the metric.
3) Based on past experiences, during an outbreak where tests kits might be in limited quantities (as is the case here), those that died will be tested to help track the disease and thus is prone to be more accurate, although still under counted. Only those that are very sick or have prolonged symptoms will be tested, that leaves the strong possibility that there is a large percent of cases where people just weren't sick enough to be tested and get better on their own without being hospitalized. And so, the true current morality rate is very likely to be lower and not higher than the calculated mortality rate.
4) The change in mortality rate is more important than the actual number. In other words, if the mortality rate holds steady at 2.2%, when the final mortality rate is calculated at the conclusion of the epidemic it might be somewhere in the range of 1.1% ~ 4.4%, it is very unlikely to jump up to 10% or 20%
5) A recent case in Germany involved a Chinese women from Wuhan in town for a company meeting. She infected 2 people and 1 of the 2 initial victims in turn infected two more for a total of 4. While all 5 patients develop symptoms, they did not require hospitalization.
Another point outside the scope of the video. The mortality rate I've been mentioning throughout this thread is the mortality of hospitalizations and not of the disease. Using this metric, the morality rate of flu is (61K death / 810k hospitalizations) 7.5%
With an official number of suspected cases standing at 15,238, the morality rate of the virus so far is (213 / (9810+15238)) 0.85%
Hope this puts your mind at ease.