There are flaws in the statistical method.
If a person catches this flu, doesn't go to the doctor and does recover, its not noted.
People who die from it are.
True. These are only "confirmed" cases.
On the other hand, quite a few likely died from it and their numbers are not in these figures - the index case for this outbreak, for example. There have been many others who have died of symptoms but either came up negative or weren't properly tested before they died so weren't counted in the WHO numbers.
In widespread testing for antibodies from other outbreak areas, there are few, if any, people who show antibodies. In other words, there don't appear to be a lot of people who recovered who remain uncounted and hidden. Usually, when you get sick with this, you are really sick and end up in a hospital, usually on a respirator. It's not just a bad cough and a headache. So, statistically, they are not there. It doesn't mean there aren't some, though. Just probably not a lot.