Around 99% of the patients developed a high temperature, while more than half experienced fatigue and a dry cough. About a third also experienced muscle pain and difficulty breathing. Research from the Chinese Center for Disease Control suggests that around 80% of coronavirus cases are mild. Around 15% of patients have gotten severe cases, and 5% have become critically ill. Here's how symptoms progress among typical…
Of closed cases (people that have recovered or died) the fatality rate is more like 10%. It's only 2% of total that have it, meaning a lot of people have neither recovered or died as it spreads and they're waiting to find out if they fall in the 10% or the other 90%. Edit: https://www.worldometers.info/coronavirus/ Looks like its now only 9%, it was 10% a day or two ago.
What I find more concerning is that the current ratio of deaths to cases is 3%, which I would expect to be an underestimate. Hopefully this is due to under-reporting of the mild cases, but it does imply either a major under-reporting of active cases or a significantly higher mortality rate than has been estimated so far (most likely the former).